243 Ida - Knowledge (XXG)

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disruption event occurred. According to an analysis of Ida's cratering processes, its surface is more than a billion years old. However, this is inconsistent with the estimated age of the Ida–Dactyl system of less than 100 million years; it is unlikely that Dactyl, due to its small size, could have escaped being destroyed in a major collision for longer. The difference in age estimates may be explained by an increased rate of cratering from the debris of the Koronis parent body's destruction.

978: 866: 1789: 1107: 1023:. Although there are a few steep slopes tilting up to about 50° on Ida, the slope generally does not exceed 35°. Ida's irregular shape is responsible for the asteroid's very uneven gravitational field. The surface acceleration is lowest at the extremities because of their high rotational speed. It is also low near the "waist" because the mass of the asteroid is concentrated in the two halves, away from this location. 593:, creatures which inhabited Mount Ida in Greek mythology. Dactyl is only 1.4 kilometres (0.87 mi) in diameter, about 1/20 the size of Ida. Its orbit around Ida could not be determined with much accuracy, but the constraints of possible orbits allowed a rough determination of Ida's density and revealed that it is depleted of metallic minerals. Dactyl and Ida share many characteristics, suggesting a common origin. 990: 1167: 5142: 948: 1032: 5166: 45: 878: 5118: 1276: 2916:

with all three abundant enough to be classified as potential ores. All three contain feldspar (an aluminosilicate of calcium, sodium, and potassium), pyroxene (silicates with one silicon atom for each atom of magnesium, iron, or calcium), olivine (silicates with two iron or magnesium atoms per silicon atom), metallic iron, and iron sulfide (the mineral

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diameter greater than 80 m (260 ft), indicating that the moon has suffered many collisions during its history. At least six craters form a linear chain, suggesting that it was caused by locally produced debris, possibly ejected from Ida. Dactyl's craters may contain central peaks, unlike those found on Ida. These features, and Dactyl's

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recently or uncovered by an impact event. Most of them are located within the craters Lascaux and Mammoth, but they may not have been produced there. This area attracts debris due to Ida's irregular gravitational field. Some blocks may have been ejected from the young crater Azzurra on the opposite side of the asteroid.

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Ida's region 2 features several sets of grooves, most of which are 100 m (330 ft) wide or less and up to 4 km (2.5 mi) long. They are located near, but are not connected with, the craters Mammoth, Lascaux, and Kartchner. Some grooves are related to major impact events, for example

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trajectory carried it into the asteroid belt twice on its way to Jupiter. During its second crossing, it flew by Ida on 28 August 1993 at a speed of 12,400 m/s (41,000 ft/s) relative to the asteroid. The onboard imager observed Ida from a distance of 240,350 km (149,350 mi) to its

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Both of these discoveries—the space weathering effects and the low density—led to a new understanding about the relationship between S-type asteroids and OC meteorites. S-types are the most numerous kind of asteroid in the inner part of the asteroid belt. OC meteorites are, likewise, the most common

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was taking place on Ida, a process which causes older regions to become more red in color over time. The same process affects both Ida and its moon, although Dactyl shows a lesser change. The weathering of Ida's surface revealed another detail about its composition: the reflection spectra of freshly

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and Jupiter, like all main-belt asteroids. Its orbital period is 4.84 years, and its rotation period is 4.63 hours. Ida has an average diameter of 31.4 km (19.5 mi). It is irregularly shaped and elongated, apparently composed of two large objects connected together. Its surface is one of

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The chondrites fall naturally into five composition classes, of which three have very similar mineral contents, but different proportions of metal and silicates. All three contain abundant iron in three different forms (ferrous iron oxide in silicates, metallic iron, and ferrous sulfide), usually

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Dactyl is an "egg-shaped" but "remarkably spherical" object measuring 1.6 by 1.4 by 1.2 kilometres (0.99 by 0.87 by 0.75 mi). It is oriented with its longest axis pointing towards Ida. Like Ida, Dactyl's surface exhibits saturation cratering. It is marked by more than a dozen craters with a

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flyby, many different theories had been proposed to explain their mineral composition. Determining their composition permits a correlation between meteorites falling to the Earth and their origin in the asteroid belt. Data returned from the flyby pointed to S-type asteroids as the source for the

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Nearly a month after a successful photo session, the Galileo spacecraft last week finished radioing to Earth a high-resolution portrait of the second asteroid ever to be imaged from space. Known as 243 Ida, the asteroid was photographed from an average distance of just 3,400 kilometers some 3.5

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Ida is one of the most densely cratered bodies yet explored in the Solar System, and impacts have been the primary process shaping its surface. Cratering has reached the saturation point, meaning that new impacts erase evidence of old ones, leaving the total crater count roughly the same. It is

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About 20 large (40–150 m across) ejecta blocks have been identified, embedded in Ida's regolith. Ejecta blocks constitute the largest pieces of the regolith. Because ejecta blocks are expected to break down quickly by impact events, those present on the surface must have been either formed

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Ida originated in the breakup of the roughly 120 km (75 mi) diameter Koronis parent body. The progenitor asteroid had partially differentiated, with heavier metals migrating to the core. Ida carried away insignificant amounts of this core material. It is uncertain how long ago the

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Dactyl may have originated at the same time as Ida, from the disruption of the Koronis parent body. However, it may have formed more recently, perhaps as ejecta from a large impact on Ida. It is extremely unlikely that it was captured by Ida. Dactyl may have suffered a major impact around

936:. Estimates of Ida's density are constrained to less than 3.2 g/cm by the long-term stability of Dactyl's orbit. This all but rules out a stony-iron composition; were Ida made of 5 g/cm iron- and nickel-rich material, it would have to contain more than 40% empty space. 1014:

Ida is a distinctly elongated asteroid, with an irregular surface. Ida is 2.35 times as long as it is wide, and a "waist" separates it into two geologically dissimilar halves. This constricted shape is consistent with Ida being made of two large, solid components, with loose

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recorded 47 images of Dactyl over an observation period of 5.5 hours in August 1993. The spacecraft was 10,760 kilometres (6,690 mi) from Ida and 10,870 kilometres (6,750 mi) from Dactyl when the first image of the moon was captured, 14 minutes before

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parent body. The largest crater, Lascaux, is almost 12 km (7.5 mi) across. Region 2 contains nearly all of the craters larger than 6 km (3.7 mi) in diameter, but Region 1 has no large craters at all. Some craters are arranged in chains.

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and Ida were secondary to the Jupiter mission. These were selected as targets in response to a new NASA policy directing mission planners to consider asteroid flybys for all spacecraft crossing the belt. No prior missions had attempted such a flyby.

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produces an acceleration of about 0.3 to 1.1 cm/s over its surface. This field is so weak that an astronaut standing on its surface could leap from one end of Ida to the other, and an object moving in excess of 20 m/s (70 ft/s) could

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Greeley, Ronald; Sullivan, Robert J.; Pappalardo, R.; Head, J.; Veverka, Joseph; Thomas, Peter C.; Lee, P.; Belton, M.; Chapman, Clark R. (March 1994). "Morphology and Geology of Asteroid Ida: Preliminary Galileo Imaging Observations".

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If in a circular orbit at the distance at which it was seen, Dactyl's orbital period would be about 20 hours. Its orbital speed is roughly 10 m/s (33 ft/s), "about the speed of a fast run or a slowly thrown baseball".

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must be more than about 65 km (40 mi) from Ida for it to remain in a stable orbit. The range of orbits generated by the simulations was narrowed down by the necessity of having the orbits pass through points at which

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The craters are simple in structure: bowl-shaped with no flat bottoms and no central peaks. They are distributed evenly around Ida, except for a protrusion north of crater Choukoutien which is smoother and less cratered. The

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variations across its surface. An exception to the crater morphology is the fresh, asymmetric Fingal, which has a sharp boundary between the floor and wall on one side. Another significant crater is Afon, which marks Ida's

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found minimal variations on the surface, and the asteroid's spin indicates a consistent density. Assuming that its composition is similar to OC meteorites, which range in density from 3.48 to 3.64 g/cm, Ida would have a

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Archinal, B. A.; Acton, C. H.; A'Hearn, M. F.; Conrad, A.; Consolmagno, G. J.; Duxbury, T.; et al. (February 2018). "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015".

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and mostly gray, although minor color variations mark newly formed or uncovered areas. Besides craters, other features are evident, such as grooves, ridges, and protrusions. Ida is covered by a thick layer of

1267:. The megaregolith layer of Ida extends between hundreds of meters below the surface to a few kilometers. Some rock in Ida's core may have been fractured below the large craters Mammoth, Lascaux, and Undara. 1643:

spacecraft during its flyby in 1993. These images provided the first direct confirmation of an asteroid moon. At the time, it was separated from Ida by a distance of 90 kilometres (56 mi), moving in a

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When Zeus was born, Rhea entrusted the guardianship of her son to the Dactyls of Ida, who are the same as those called Curetes. They came from Cretan Ida – Heracles, Paeonaeus, Epimedes, Iasius and

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and Edward F. Tedesco as part of the eight-color asteroid survey (ECAS). Its spectrum matched those of the asteroids in the S-type classification. Many observations of Ida were made in early 1993 by the

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of a uniformly dense object the same shape as Ida coincides with the spin axis of the asteroid. This suggests that there are no major variations of density within the asteroid. Ida's axis of rotation

1648:. Dactyl is heavily cratered, like Ida, and consists of similar materials. Its origin is uncertain, but evidence from the flyby suggests that it originated as a fragment of the Koronis parent body. 746:

closest approach of 2,390 km (1,490 mi). Ida was the second asteroid, after Gaspra, to be imaged by a spacecraft. About 95% of Ida's surface came into view of the probe during the flyby.

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Belton, M. J. S.; Chapman, C. R.; Thomas, P. C.; Davies, M. E.; Greenberg, R.; Klaasen, K.; et al. (1995). "Bulk density of asteroid 243 Ida from the orbit of its satellite Dactyl".

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Chapman, Clark R.; Belton, Michael J. S.; Veverka, Joseph; Neukum, G.; Head, J.; Greeley, Ronald; Klaasen, K.; Morrison, D. (March 1994). "First Galileo image of asteroid 243 Ida".

1188:. Azzurra seems to be the most recent major impact on Ida. The ejecta from this collision is distributed discontinuously over Ida and is responsible for the large-scale color and 3833:

Lee, Pascal; Veverka, Joseph; Thomas, Peter C.; Helfenstein, Paul; Belton, Michael J. S.; Chapman, Clark R.; Greeley, Ronald; Pappalardo, Robert T.; et al. (March 1996).

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are very similar. The small differences indicate that the space weathering process is less active on Dactyl. Its small size would make the formation of significant amounts of

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covered with craters of all sizes and stages of degradation, and ranging in age from fresh to as old as Ida itself. The oldest may have been formed during the breakup of the

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type of meteorite found on the Earth's surface. The reflection spectra measured by remote observations of S-type asteroids, however, did not match that of OC meteorites. The

4148: 3779: 739:. Mission planners delayed the decision to attempt a flyby until they were certain that this would leave the spacecraft enough propellant to complete its Jupiter mission. 5063: 674: 5233: 5188: 3390: 1701:

shape, imply that the moon is gravitationally controlled despite its small size. Like Ida, its average temperature is about 200 K (−73 °C; −100 °F).

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observed Ida for eight hours and was unable to spot Dactyl. It would have been able to observe it if it were more than about 700 km (430 mi) from Ida.

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Chapman, Clark R.; Ryan, Eileen V.; Merline, William J.; Neukum, Gerhard; Wagner, Roland; Thomas, Peter C.; Veverka, Joseph; Sullivan, Robert J. (March 1996).

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Berger, Peter (2003). "The Gildemeester Organisation for Assistance to Emigrants and the expulsion of Jews from Vienna, 1938–1942". In Gourvish, Terry (ed.).

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Belton, M. J. S.; Chapman, Clark R.; Klaasen, Kenneth P.; Harch, Ann P.; Thomas, Peter C.; Veverka, Joseph; McEwen, Alfred S.; Pappalardo, Robert T. (1996).

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Geissler, Paul E.; Petit, Jean-Marc; Greenberg, Richard (1996). "Ejecta Reaccretion on Rapidly Rotating Asteroids: Implications for 243 Ida and 433 Eros".

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Sullivan, Robert J.; Greeley, Ronald; Pappalardo, R.; Asphaug, E.; Moore, J. M.; Morrison, D.; Belton, Michael J. S.; Carr, M.; et al. (March 1996).

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Petit, Jean-Marc; Durda, Daniel D.; Greenberg, Richard; Hurford, Terry A.; Geissler, Paul E. (November 1997). "The Long-Term Dynamics of Dactyl's Orbit".

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Greenberg, Richard; Bottke, William F.; Nolan, Michael; Geissler, Paul E.; Petit, Jean-Marc; Durda, Daniel D.; Asphaug, Erik; Head, James (March 1996).

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Chapman, Clark R. (October 1996). "S-Type Asteroids, Ordinary Chondrites, and Space Weathering: The Evidence from Galileo's Fly-bys of Gaspra and Ida".

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Monet, A. K. B.; Stone, R. C.; Monet, D. G.; Dahn, C. C.; Harris, H. C.; Leggett, S. K.; Pier, J. R.; Vrba, F. J.; Walker, R. L. (June 1994).

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Geissler, Paul E.; Petit, Jean-Marc; Durda, Daniel D.; Greenberg, Richard; Bottke, William F.; Nolan, Michael; Moore, Jeffrey (March 1996).

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observed Dactyl to be at 16:52:05 UT on 28 August 1993, about 90 km (56 mi) from Ida at longitude 85°. On 26 April 1994, the

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Thomas, Peter C.; Belton, Michael J. S.; Carcich, B.; Chapman, Clark R.; Davies, M. E.; Sullivan, Robert J.; Veverka, Joseph (1996).

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excavated by impacts is deposited differently on Ida than on planets because of its rapid rotation, low gravity and irregular shape.

5228: 4789: 1444: 761:. The remaining images were sent in February 1994, when the spacecraft's proximity to the Earth allowed higher speed transmissions. 4687: 4534: 4210:

Zellner, Ben; Tholen, David J.; Tedesco, Edward F. (March 1985). "The eight-color asteroid survey: Results for 589 minor planets".

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based on the similarity of its reflectance spectra with similar asteroids. S-types may share their composition with stony-iron or

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of Dactyl's orbit when most of the images were taken, which made determining its exact orbit difficult. Dactyl orbits in the

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exposed parts of the surface resembled that of OC meteorites, but the older regions matched the spectra of S-type asteroids.

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Chapman, Clark R.; Klaasen, K.; Belton, Michael J. S.; Veverka, Joseph (July 1994). "Asteroid 243 IDA and its satellite".

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settle asymmetrically around their craters, but fast-moving ejecta that escapes from the asteroid is permanently lost.

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The Standard American Encyclopedia of Arts, Sciences, History, Biography, Geography, Statistics, and General Knowledge

2920:). These three classes, referred to collectively as the ordinary chondrites, contain quite different amounts of metal. 1318:

with a period of 77 thousand years, due to the gravity of the Sun acting upon the nonspherical shape of the asteroid.

681:. These improved the measurement of Ida's orbit around the Sun and reduced the uncertainty of its position during the 4867: 3541:

Chapman, Clark R. (September 1995). "Galileo Observations of Gaspra, Ida, and Dactyl: Implications for Meteoritics".

1134:, connected by a "waist". This feature may have been filled in by debris, or blasted out of the asteroid by impacts. 600:

and the subsequent measurement of Ida's mass provided new insights into the geology of S-type asteroids. Before the

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Several major structures mark Ida's surface. The asteroid appears to be split into two halves, here referred to as

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flyby of Ida found that some S-types, particularly the Koronis family, could be the source of these meteorites.

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The Eos and Koronis families ... are entirely of type S, which is rare at their heliocentric distances ...

1399: 909:. Ida's relatively large surface exhibited a diverse range of geological features. The discovery of Ida's moon 111: 1291:

asteroids. Ida orbits the Sun at an average distance of 2.862 AU (428.1 Gm), between the orbits of

1052:, loose debris that obscures the solid rock beneath. The largest, boulder-sized, debris fragments are called 4981: 3026: 1932: 1599: 1588: 500: 438: 390: 379: 250: 236: 928:

flybys, but was interpreted to be either of two minerals found in meteorites that had fallen to the Earth:

3992: 1818: 1103:. Because of this process, older regolith appears more red in color compared to freshly exposed material. 721: 5072: 1848: 678: 626: 564:, the most numerous type in the inner asteroid belt. On 28 August 1993, Ida was visited by the uncrewed 350: 4629: 1137:

Region 1 of Ida contains two major structures. One is a prominent 40 km (25 mi) ridge named

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filling the gap between them. However, no such debris was seen in high-resolution images captured by

933: 913:, the first confirmed satellite of an asteroid, provided additional insights into Ida's composition. 707: 566: 280: 50: 31: 4969: 4945: 4937: 3997: 5170: 1681: 1561: 1461: 1184: 1003: 769: 750: 590: 557: 327: 156: 4961: 4953: 4928: 1141:

that stretches 150 degrees around Ida's surface. The other structure is a large indentation named

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the most heavily cratered in the Solar System, featuring a wide variety of crater sizes and ages.

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D'Amario, Louis A.; Bright, Larry E.; Wolf, Aron A. (May 1992). "Galileo trajectory design".

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direction and is inclined about 8° to Ida's equator. Based on computer simulations, Dactyl's

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on Earth. The crater Azzurra, for example, is named after a submerged cave on the island of

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Images from the flyby, starting 5.4 hours before closest approach and showing Ida's rotation

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Transmission of many Ida images was delayed due to a permanent failure in the spacecraft's

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mission member Ann Harch, while examining delayed image downloads from the spacecraft.

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Ida's moon Dactyl was discovered by mission member Ann Harch in images returned from

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impossible. This contrasts with Ida, which is covered by a deep layer of regolith.

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Size comparison of Ida, several other asteroids, the dwarf planet Ceres, and Mars

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Byrnes, Dennis V.; D'Amario, Louis A.; Galileo Navigation Team (December 1994).

3800:"Tidal Evolution by Elongated Primaries: Implications for the Ida/Dactyl System" 1610: 1166: 489: 466: 58:

is located on the right "tip" of the asteroid. The dot to the right is its moon

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trajectory to approach Ida required that it consume 34 kg (75 lb) of

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Vokrouhlicky, David; Nesvorny, David; Bottke, William F. (11 September 2003).

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Ida's interior probably contains some amount of impact-fractured rock, called

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Cowen, Ron (2 October 1993). "Close-up of an asteroid: Galileo eyes Ida".

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Bottke, William F. Jr.; Cellino, A.; Paolicchi, P.; Binzel, R. P. (2002).

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of 2.27–3.10 g/cm. OC meteorites contain varying amounts of the silicates

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Asymmetric 1.5 km (0.93 mi) wide crater Fingal at 13.2°S, 39.9°E

877: 44: 5095: 4474:. Cambridge Planetary Science. Vol. 11. Cambridge University Press. 3824: 3799: 3411:"Galileo's Encounter with 243 Ida: An Overview of the Imaging Experiment" 2917: 1713: 1709: 1698: 1263: 1255: 1242: 1234: 1096: 1088: 1068: 1049: 537: 4611:"Idiosyncrasies of Ida—asteroid 243 Ida's irregular gravitational field" 4447: 4128: 3499:

Chapman, Clark R. (1994). "The Galileo Encounters with Gaspra and Ida".

4353:. Translated by Jones, W. H. S.; Omerod, H. A. Loeb Classical Library. 3659: 2973: 2971: 2969: 2967: 1983: 1981: 1296: 1249:. The mineral content appears to be homogeneous throughout its extent. 1230: 1092: 906: 803: 702: 571: 413: 3942:"The overlapping plates method applied to CCD observations of 243 Ida" 3168: 3166: 2693: 2691: 2614: 2612: 2610: 1275: 1066:

The surface of Ida is covered in a blanket of pulverized rock, called

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Mining the Sky: Untold Riches from the Asteroids, Comets, and Planets

3061: 3059: 3057: 2725: 2723: 2721: 2385: 2383: 2063: 2061: 2059: 2021: 1705: 1202: 1189: 1016: 728: 4705:"Discovery of Ida's Moon Indicates Possible "Families" of Asteroids" 5129: 4740:"Johann Palisa, the most successful visual discoverer of asteroids" 3966: 3941: 3931: 3906: 2086: 1342: 3452:

Britt, D. T.; Yeomans, D. K.; Housen, K.; Consolmagno, G. (2002).

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and redistributed across Ida's surface by geological processes.

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Ida's mass is between 3.65 and 4.99 × 10 kg. Its

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Ida was discovered on 29 September 1884 by Austrian astronomer

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meteorites, the most common type found on the Earth's surface.

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Orbit and positions of Ida and five planets as of 9 March 2009

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Trajectory of Galileo from launch to Jupiter orbital insertion

199: 4405:"Catalogue of Minor Planet Names and Discovery Circumstances" 3364:"An Overview of the Asteroids: The Asteroids III Perspective" 1987: 4651:

Abstracts of the 25th Lunar and Planetary Science Conference

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Abstracts of the 25th Lunar and Planetary Science Conference

4102:"The vector alignments of asteroid spins by thermal torques" 3907:"Astrometry for the Galileo mission. 1: Asteroid encounters" 3258: 2977: 2843: 2618: 1099:. Its appearance changes over time through a process called 3172: 3153: 3151: 2882: 2729: 2697: 2682: 2646: 2565: 2553: 1760: 1737: 1515: 1512: 202: 190: 139: 133: 4167:

Wilson, Lionel; Keil, Klaus; Love, Stanley J. (May 1999).

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The two largest imaged craters on Dactyl were named Acmon

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image of a 150 m (490 ft) block at 24.8°S, 2.8°E

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Asphaug, Erik; Ryan, Eileen V.; Zuber, Maria T. (2003).

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of 4.63 hours (roughly 5 hours). The calculated maximum

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asteroid mission, permitted the first study of asteroid

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This article is about an asteroid. For other uses, see

2793: 2584: 2428: 2299: 2284: 2272: 2241: 1058:, several of which have been observed on the surface. 924:. The composition of S-types was uncertain before the 560:. Later telescopic observations categorized Ida as an 5106: 4463:

Thomas, Peter C.; Prockter, Louise M. (28 May 2004).

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minutes before Galileo's closest approach on Aug. 28.

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trajectory from 19 October 1989 to 30 September 2003

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Belton, Michael J. S.; Carlson, R. (12 March 1994).

4169:"The internal structures and densities of asteroids" 3078: 3076: 3074: 2217: 2200: 2188: 1834:

100 million years ago, which reduced its size.

1763: 1509: 1503: 1491: 1436: 1430: 1421: 196: 136: 3798:Hurford, Terry A.; Greenberg, Richard (June 2000). 2756: 2416: 2370: 1766: 1754: 1734: 1725: 1704:Dactyl shares many characteristics with Ida. Their 1609: 1597: 1587: 1580: 1570: 1560: 1548: 1536: 1529: 1500: 1479: 1467: 1455: 1418: 1409: 1397: 1392: 1384: 1371: 1361: 1356: 1347:Highest-resolution image of Dactyl, recorded while 512: 498: 488: 476: 463: 448: 436: 423: 410: 400: 388: 378: 371: 360: 348: 336: 326: 314: 301: 289: 279: 263: 249: 235: 216: 193: 178: 162: 150: 130: 121: 109: 104: 96: 84: 72: 67: 4778:33rd Annual Lunar and Planetary Science Conference 4301: 3121: 3119: 3014: 2740: 2738: 2597: 2595: 2593: 2525: 2523: 2521: 2519: 2517: 2515: 2513: 2500: 2498: 2496: 2488: 2463: 2461: 2459: 2457: 2455: 2453: 2451: 2449: 2368: 2366: 2364: 2362: 2360: 2358: 2356: 2354: 2352: 2350: 2256: 2254: 2252: 2250: 2172: 2170: 2168: 1920: 1796:Dactyl's orbit around Ida is not precisely known. 939:The Galileo images also led to the discovery that 4442:(Thesis). Massachusetts Institute of Technology. 3835:"Ejecta Blocks on 243 Ida and on Other Asteroids" 1844:List of geological features on 243 Ida and Dactyl 1299:. Ida takes 4.84089 years to complete one orbit. 668:was measured on 16 September 1980 by astronomers 3157: 3092: 3090: 2989: 2854: 2852: 1792:Diagram of potential orbits of Dactyl around Ida 757:of the asteroid at a resolution of 31–38 m/ 685:flyby from 78 to 60 km (48 to 37 mi). 4440:Spin-Axis Alignment of Koronis Family Asteroids 3886:Journal of the British Astronomical Association 3140: 2913: 2327: 2204: 2082: 2080: 2078: 2076: 1245:. Olivine and pyroxene were detected on Ida by 633:, a Viennese brewer and amateur astronomer. In 4552:"Solving for Dactyl's Orbit and Ida's Density" 3884:Mason, John W. (June 1994). "Ida's new moon". 2931: 2897: 2782: 2105: 1883:A Practical Dictionary of the English Language 1174:Ida's major craters are named after caves and 625:. It was his 45th asteroid discovery. Ida was 5057: 4872:National Aeronautics and Space Administration 4850:. Jet Propulsion Laboratory. 25 August 2008. 4308:. Cambridge, UK: Cambridge University Press. 4281:Carroll, Bradley W.; Ostlie, Dale A. (1996). 4254:. Cambridge, UK: Cambridge University Press. 3940:Owen, W. M. Jr.; Yeomans, D. K. (June 1994). 3082: 3001: 2831: 1973: 8: 4703:Holm, Jeanne (June 1994). Jones, Jan (ed.). 4300:Greeley, Ronald; Batson, Raymond M. (2001). 3728:Completing the Inventory of the Solar System 3107: 3105: 2631: 2629: 2627: 1335: 1039:3.5 minutes before its closest approach 37: 4769:Sárneczky, K; Kereszturi, Á. (March 2002). 4620:. Vol. 147, no. 15. p. 207. 4596:. Vol. 144, no. 14. p. 215. 3454:"Asteroid Density, Porosity, and Structure" 3296:Celestial Mechanics and Dynamical Astronomy 2229: 2156: 2154: 2152: 2150: 1639:. It was discovered in images taken by the 5064: 5050: 5042: 4985: 4892:"Gazetteer of Planetary Nomenclature: Ida" 4848:"JPL Small-Body Database Browser: 243 Ida" 4411:. IAU commission. Vol. 20. Springer. 4304:The Compact NASA Atlas of the Solar System 4251:Business and Politics in Europe, 1900–1970 3749:"Collisional and Dynamical History of Ida" 3137: 1904: 1902: 1900: 1898: 1896: 1894: 1892: 1890: 1866: 1864: 1351:was about 3,900 km away from the moon 1341: 43: 4747:Meeting on Asteroids and Comets in Europe 4666:Green, Daniel W. E. (26 September 1994). 4192: 4090: 3996: 3965: 3930: 3823: 3616: 3434: 1958: 1956: 1954: 1952: 1950: 3125: 2129: 2068:Vokrouhlicky, Nesvorny & Bottke 2003 1656:Dactyl was found on 17 February 1994 by 1105: 899:flybys of Gaspra and Ida, and the later 653:. Ida was recognized as a member of the 5234:Astronomical objects discovered in 1884 5189:Minor planet object articles (numbered) 5113: 4925:, Robert Johnston, johnstonsarchive.net 4810:"Reflections on the Geology of 243 Ida" 3049:"The Argonautica" of Apollonius Rhodius 2816: 2814: 2805: 2670: 2601: 2529: 2504: 2467: 2374: 2341: 2260: 2176: 2117: 1860: 4902:from the original on 23 September 2006 4868:"Images of Asteroids Ida & Dactyl" 4283:An Introduction to Modern Astrophysics 3486:from the original on 17 September 2003 2958: 2744: 2141: 1615:200 K (−73 °C; −100 °F) 1334: 36: 4668:"1993 (243) 1 = (243) Ida I (Dactyl)" 4438:Slivan, Stephen Michael (June 1995). 4367:from the original on 18 November 2019 4285:. Addison-Wesley Publishing Company. 3111: 3096: 2909: 2635: 2323: 577:Ida's orbit lies between the planets 339:Longitude of ascending node 7: 4795:from the original on 26 January 2005 4690:from the original on 1 February 2019 4537:from the original on 1 February 2019 3035:participating institution membership 2794:Geissler, Petit & Greenberg 1996 2585:Geissler, Petit & Greenberg 1996 2429:Geissler, Petit & Greenberg 1996 2160: 2087:Archinal, Acton, A'Hearn et al. 2018 1941:participating institution membership 1908: 1870: 5214:Minor planets visited by spacecraft 4990: 4173:Meteoritics & Planetary Science 3349:from the original on 30 August 2021 1962: 1635:named Dactyl, official designation 995:Successive images of a rotating Ida 4854:from the original on 7 August 2011 4817:Lunar and Planetary Science XXVIII 4771:"'Global' Tectonism on Asteroids?" 4194:10.1111/j.1945-5100.1999.tb01355.x 3713:from the original on 20 March 2009 3584:10.1111/j.1945-5100.1996.tb02107.x 2218:Zellner, Tholen & Tedesco 1985 2201:Zellner, Tholen & Tedesco 1985 2189:Zellner, Tholen & Tedesco 1985 1676:1993 (243) 1. It was named by the 1087:Ida's regolith is composed of the 711:. Its encounters of the asteroids 25: 4834:from the original on 4 March 2009 4425:from the original on 15 June 2024 4390:from the original on 15 June 2024 4268:from the original on 15 June 2024 3625:from the original on 11 June 2019 3396:from the original on 11 June 2019 675:US Naval Observatory in Flagstaff 5164: 5152: 5140: 5128: 5116: 4933:AstDyS-2, Asteroids—Dynamic Site 4874:. 23 August 2005. Archived from 4409:Dictionary of minor planet names 4154:from the original on 11 May 2008 3785:from the original on 5 June 2019 2820: 2300:D'Amario, Bright & Wolf 1992 2285:D'Amario, Bright & Wolf 1992 2273:D'Amario, Bright & Wolf 1992 2242:D'Amario, Bright & Wolf 1992 1750: 1721: 1678:International Astronomical Union 1487: 1414: 988: 976: 876: 864: 768: 186: 126: 4898:Astrogeology Research Program. 4896:United States Geological Survey 4332:. Reading, MA: Addison-Wesley. 2757:Sárneczky & Kereszturi 2002 720:was launched into orbit by the 701:Ida was visited in 1993 by the 297:1,767.644 days (4.83955 a) 3158:Asphaug, Ryan & Zuber 2003 1680:in 1994, for the mythological 1043:Ida's surface appears heavily 1: 1149:a set opposite Vienna Regio. 1035:Mosaic of images recorded by 731:on 18 October 1989. Changing 570:spacecraft while en route to 5199:Discoveries by Johann Palisa 4380:Ridpath, John Clark (1897). 4232:10.1016/0019-1035(85)90133-2 3804:Geophysical Research Letters 2990:Hurford & Greenberg 2000 2898:Wilson, Keil & Love 1999 2106:Wilson, Keil & Love 1999 1080:observed evidence of recent 558:a nymph from Greek mythology 4609:Cowen, Ron (1 April 1995). 4465:"Tectonics of Small Bodies" 4386:. Encyclopedia Publishing. 1669:made its closest approach. 1082:downslope regolith movement 895:The data returned from the 351:Argument of perihelion 59: 5250: 4403:Schmadel, Lutz D. (2003). 3501:Asteroids, Comets, Meteors 2932:Thomas & Prockter 2004 2783:Thomas & Prockter 2004 2489:Byrnes & D'Amario 1994 1624: 1544:90 km at time of discovery 922:spectroscopic measurements 613:Discovery and observations 384:59.8 × 25.4 × 18.6 km 165:Minor planet category 29: 5224:S-type asteroids (Tholen) 5079: 4923:Asteroids with Satellites 3316:10.1007/s10569-017-9805-5 3186:"Planetary Names: Dactyl" 3083:Belton & Carlson 1994 3022:Oxford English Dictionary 3002:Carroll & Ostlie 1996 2832:Greeley & Batson 2001 1928:Oxford English Dictionary 1619: 1551:Orbital period (sidereal) 1340: 1217:Ida was classified as an 596:The images returned from 589:. It was named after the 527: 444:4.63 hours (0.193 d) 292:Orbital period (sidereal) 223: 42: 5229:S-type asteroids (SMASS) 3946:The Astronomical Journal 3911:The Astronomical Journal 3047:Edward Coleridge (1990) 1692:Physical characteristics 1688:on the island of Crete. 1582:Physical characteristics 1470:Alternative designations 968:Physical characteristics 916:Ida is classified as an 515:Absolute magnitude 494:200 K (−73 °C) 373:Physical characteristics 5073:Minor planets navigator 4982:JPL Small-Body Database 4185:1999M&PS...34..479W 3576:1996M&PS...31..699C 3477:10.2307/j.ctv1v7zdn4.37 3027:Oxford University Press 2230:Owen & Yeomans 1994 1933:Oxford University Press 1600:Synodic rotation period 1531:Orbital characteristics 1283:Ida is a member of the 1011:the asteroid entirely. 951:Polished section of an 439:Synodic rotation period 218:Orbital characteristics 4946:Observation prediction 4808:Stooke, P. J. (1997). 4738:Raab, Herbert (2002). 4092:10.1006/icar.1996.0033 4043:10.1006/icar.1996.0041 4007:10.1006/icar.1997.5788 3862:10.1006/icar.1996.0039 3776:10.1006/icar.1996.0040 3704:10.1006/icar.1996.0042 3618:10.1006/icar.1996.0038 3436:10.1006/icar.1996.0032 3387:10.2307/j.ctv1v7zdn4.7 3145: 2922: 2332: 2208: 1819:Hubble Space Telescope 1793: 1280: 1171: 1114: 1040: 956: 920:based on ground-based 4731:6 August 2019 at the 4709:The Galileo Messenger 4556:The Galileo Messenger 4350:Description of Greece 3640:Space Science Reviews 3259:Greenberg et al. 1996 3188:. IAU. Archived from 3138:Pausanias & 5.7.6 2978:Greenberg et al. 1996 1849:List of minor planets 1791: 1672:Dactyl was initially 1278: 1169: 1109: 1034: 950: 679:Oak Ridge Observatory 406:4.2 ± 0.6 ×10 kg 4711:(34). Archived from 4558:(35). Archived from 4016:"Geology of 243 Ida" 3825:10.1029/1999GL010956 3325:"Asteroid Interiors" 2947:Sullivan et al. 1996 2883:Geissler et al. 1996 2871:Sullivan et al. 1996 2859:Sullivan et al. 1996 2768:Sullivan et al. 1996 2713:Sullivan et al. 1996 2698:Geissler et al. 1996 2554:Geissler et al. 1996 2312:Sullivan et al. 1996 1881:Noah Webster (1884) 1400:MPC designation 1304:retrograde direction 1182:, also known as the 427:surface gravity 271:2.861 AU (4.280 255:2.743 AU (4.103 241:2.979 AU (4.457 112:MPC designation 32:Ida (disambiguation) 5204:Named minor planets 5033:Physical parameters 4825:1997LPI....28.1385S 4786:2002LPI....33.1381S 4684:1994IAUC.6082....2G 4659:1994LPI....25..469G 4585:1994LPI....25..237C 4531:1994IAUC.5948....2B 4472:Planetary Tectonics 4224:1985Icar...61..355Z 4129:10.1038/nature01948 4121:2003Natur.425..147V 4083:1996Icar..120...20T 4035:1996Icar..120..119S 3989:1997Icar..130..177P 3958:1994AJ....107.2295O 3923:1994AJ....107.2290M 3898:1994JBAA..104..108M 3854:1996Icar..120...87L 3816:2000GeoRL..27.1595H 3768:1996Icar..120..106G 3740:1996ASPC..107...57G 3696:1996Icar..120..140G 3652:1992SSRv...60...23D 3609:1996Icar..120...77C 3555:1995Metic..30R.496C 3534:1994Metic..29..455C 3513:1994IAUS..160..357C 3469:2002aste.book..485B 3427:1996Icar..120....1B 3379:2002aste.book....3B 3340:2002aste.book..463A 3308:2018CeMDA.130...22A 3173:Chapman et al. 1994 3025:(Online ed.). 2659:Greeley et al. 1994 2441:Chapman et al. 1994 2405:Greeley et al. 1994 2390:Chapman et al. 1994 2191:, pp. 357, 373 2014:1995Natur.374..785B 1931:(Online ed.). 1385:Discovery date 1373:Discovery site 1337: 1302:Ida rotates in the 1004:gravitational field 705:-bound space probe 666:reflection spectrum 649:who raised the god 419:2.6 ± 0.5 g/cm 157:Ida (nurse of Zeus) 97:Discovery date 86:Discovery site 39: 4970:Observational info 4878:on 21 October 2008 4756:on 30 October 2008 4347:Pausanias (1916). 4067:"The shape of Ida" 3660:10.1007/BF00216849 3593:"Cratering on Ida" 2844:Bottke et al. 2002 2808:, pp. 707–708 2619:Bottke et al. 2002 2544:, pp. 179–180 2089:, p. 6, 15–16 2052:Thomas et al. 1996 1974:Belton et al. 1996 1794: 1637:(243) Ida I Dactyl 1556:prograde, ca. 20 h 1405:(243) Ida I Dactyl 1363:Discovered by 1281: 1271:Orbit and rotation 1223:ordinary chondrite 1172: 1115: 1041: 957: 953:ordinary chondrite 930:ordinary chondrite 659:Kiyotsugu Hirayama 623:Vienna Observatory 607:ordinary chondrite 554:Vienna Observatory 100:September 29, 1884 91:Vienna Observatory 74:Discovered by 54:image of 243 Ida. 27:Main-belt asteroid 5194:Koronis asteroids 5104: 5103: 4562:on 5 January 1997 4481:978-0-521-76573-2 4418:978-3-540-00238-3 4360:978-0-674-99104-0 4339:978-0-201-47959-1 4315:978-0-521-80633-6 4292:978-0-201-54730-6 4261:978-0-521-82344-9 4115:(6954): 147–151. 3810:(11): 1595–1598. 3271:Petit et al. 1997 3247:Petit et al. 1997 3235:Petit et al. 1997 3223:Petit et al. 1997 3211:Petit et al. 1997 3066:Petit et al. 1997 3033:(Subscription or 2542:Petit et al. 1997 2417:Monet et al. 1994 2008:(6525): 785–788. 1988:Britt et al. 2002 1939:(Subscription or 1623: 1622: 1572:Satellite of 1312:moment of inertia 751:high-gain antenna 631:Moriz von Kuffner 531: 530: 432:0.3–1.1 cm/s 16:(Redirected from 5241: 5209:Binary asteroids 5169: 5168: 5167: 5157: 5156: 5155: 5145: 5144: 5143: 5133: 5132: 5121: 5120: 5119: 5112: 5066: 5059: 5052: 5043: 5025:Orbital elements 4989: 4911: 4909: 4907: 4887: 4885: 4883: 4863: 4861: 4859: 4843: 4841: 4839: 4833: 4814: 4804: 4802: 4800: 4794: 4775: 4765: 4763: 4761: 4755: 4749:. Archived from 4744: 4724: 4722: 4720: 4699: 4697: 4695: 4662: 4644: 4642: 4640: 4635:on 27 March 2012 4634: 4628:. Archived from 4615: 4605: 4588: 4571: 4569: 4567: 4546: 4544: 4542: 4500: 4498: 4496: 4490: 4484:. Archived from 4469: 4459: 4434: 4432: 4430: 4399: 4397: 4395: 4376: 4374: 4372: 4343: 4319: 4307: 4296: 4277: 4275: 4273: 4235: 4206: 4196: 4163: 4161: 4159: 4153: 4106: 4096: 4094: 4061: 4059: 4057: 4051: 4045:. Archived from 4020: 4010: 4000: 3971: 3969: 3952:(6): 2295–2298. 3936: 3934: 3917:(6): 2290–2294. 3901: 3880: 3878: 3876: 3870: 3864:. Archived from 3839: 3829: 3827: 3794: 3792: 3790: 3784: 3753: 3743: 3722: 3720: 3718: 3712: 3681: 3671: 3634: 3632: 3630: 3620: 3587: 3558: 3537: 3516: 3495: 3493: 3491: 3485: 3458: 3448: 3438: 3405: 3403: 3401: 3395: 3368: 3358: 3356: 3354: 3348: 3329: 3319: 3286:Journal articles 3274: 3268: 3262: 3256: 3250: 3244: 3238: 3232: 3226: 3220: 3214: 3208: 3202: 3201: 3199: 3197: 3182: 3176: 3170: 3161: 3155: 3146: 3135: 3129: 3123: 3114: 3109: 3100: 3094: 3085: 3080: 3069: 3063: 3052: 3045: 3039: 3038: 3030: 3018: 3011: 3005: 2999: 2993: 2987: 2981: 2975: 2962: 2956: 2950: 2944: 2935: 2929: 2923: 2907: 2901: 2895: 2886: 2880: 2874: 2868: 2862: 2856: 2847: 2841: 2835: 2829: 2823: 2818: 2809: 2803: 2797: 2796:, pp. 57–58 2791: 2785: 2780: 2771: 2765: 2759: 2754: 2748: 2742: 2733: 2727: 2716: 2710: 2701: 2695: 2686: 2680: 2674: 2668: 2662: 2656: 2650: 2644: 2638: 2633: 2622: 2616: 2605: 2599: 2588: 2582: 2569: 2563: 2557: 2551: 2545: 2539: 2533: 2527: 2508: 2502: 2491: 2486: 2471: 2465: 2444: 2438: 2432: 2426: 2420: 2414: 2408: 2402: 2393: 2387: 2378: 2372: 2345: 2339: 2333: 2321: 2315: 2309: 2303: 2297: 2288: 2282: 2276: 2270: 2264: 2258: 2245: 2239: 2233: 2227: 2221: 2215: 2209: 2198: 2192: 2186: 2180: 2174: 2163: 2158: 2145: 2139: 2133: 2127: 2121: 2115: 2109: 2103: 2090: 2084: 2071: 2065: 2054: 2049: 2034: 2033: 2022:10.1038/374785a0 1997: 1991: 1985: 1976: 1971: 1965: 1960: 1945: 1944: 1936: 1924: 1917: 1911: 1906: 1885: 1879: 1873: 1868: 1779: 1778: 1775: 1774: 1771: 1768: 1765: 1762: 1759: 1756: 1747: 1746: 1743: 1742: 1739: 1736: 1733: 1730: 1727: 1525: 1524: 1521: 1520: 1517: 1514: 1511: 1508: 1505: 1502: 1499: 1496: 1493: 1448: 1443: 1442: 1439: 1438: 1435: 1432: 1429: 1426: 1423: 1420: 1388:17 February 1994 1345: 1338: 1101:space weathering 1027:Surface features 992: 980: 941:space weathering 880: 868: 859: 857: 848: 843: 834: 829: 820: 815: 806: 801: 792: 787: 781: 772: 556:and named after 479:Geometric albedo 465:North pole 455: 450:North pole 274: 258: 244: 212: 211: 208: 207: 204: 201: 198: 195: 192: 146: 145: 142: 141: 138: 135: 132: 47: 40: 21: 5249: 5248: 5244: 5243: 5242: 5240: 5239: 5238: 5219:Galileo program 5179: 5178: 5175: 5165: 5163: 5153: 5151: 5141: 5139: 5127: 5117: 5115: 5107: 5105: 5100: 5075: 5070: 4962:Proper elements 4919: 4914: 4905: 4903: 4890: 4881: 4879: 4866: 4857: 4855: 4846: 4837: 4835: 4831: 4812: 4807: 4798: 4796: 4792: 4773: 4768: 4759: 4757: 4753: 4742: 4737: 4733:Wayback Machine 4718: 4716: 4715:on 24 June 2010 4702: 4693: 4691: 4665: 4647: 4638: 4636: 4632: 4613: 4608: 4591: 4574: 4565: 4563: 4549: 4540: 4538: 4512: 4508: 4503: 4494: 4492: 4491:on 4 March 2009 4488: 4482: 4467: 4462: 4437: 4428: 4426: 4419: 4402: 4393: 4391: 4379: 4370: 4368: 4361: 4346: 4340: 4322: 4316: 4299: 4293: 4280: 4271: 4269: 4262: 4247: 4243: 4238: 4209: 4166: 4157: 4155: 4151: 4104: 4099: 4064: 4055: 4053: 4052:on 12 June 2016 4049: 4018: 4013: 3998:10.1.1.693.8814 3974: 3939: 3904: 3883: 3874: 3872: 3871:on 12 June 2016 3868: 3837: 3832: 3797: 3788: 3786: 3782: 3751: 3746: 3725: 3716: 3714: 3710: 3679: 3674: 3637: 3628: 3626: 3590: 3561: 3540: 3519: 3498: 3489: 3487: 3483: 3456: 3451: 3408: 3399: 3397: 3393: 3366: 3361: 3352: 3350: 3346: 3327: 3322: 3292: 3288: 3283: 3278: 3277: 3269: 3265: 3257: 3253: 3245: 3241: 3233: 3229: 3221: 3217: 3209: 3205: 3195: 3193: 3184: 3183: 3179: 3171: 3164: 3156: 3149: 3136: 3132: 3124: 3117: 3110: 3103: 3095: 3088: 3081: 3072: 3064: 3055: 3046: 3042: 3032: 3013: 3012: 3008: 3000: 2996: 2988: 2984: 2976: 2965: 2957: 2953: 2945: 2938: 2930: 2926: 2908: 2904: 2896: 2889: 2881: 2877: 2869: 2865: 2857: 2850: 2842: 2838: 2830: 2826: 2819: 2812: 2804: 2800: 2792: 2788: 2781: 2774: 2766: 2762: 2755: 2751: 2743: 2736: 2730:Lee et al. 1996 2728: 2719: 2711: 2704: 2696: 2689: 2683:Lee et al. 1996 2681: 2677: 2669: 2665: 2657: 2653: 2647:Lee et al. 1996 2645: 2641: 2634: 2625: 2617: 2608: 2600: 2591: 2583: 2572: 2566:Lee et al. 1996 2564: 2560: 2552: 2548: 2540: 2536: 2528: 2511: 2503: 2494: 2487: 2474: 2466: 2447: 2439: 2435: 2427: 2423: 2415: 2411: 2403: 2396: 2388: 2381: 2373: 2348: 2340: 2336: 2322: 2318: 2310: 2306: 2298: 2291: 2283: 2279: 2271: 2267: 2259: 2248: 2240: 2236: 2228: 2224: 2216: 2212: 2199: 2195: 2187: 2183: 2175: 2166: 2159: 2148: 2140: 2136: 2128: 2124: 2116: 2112: 2104: 2093: 2085: 2074: 2066: 2057: 2050: 2037: 1999: 1998: 1994: 1986: 1979: 1972: 1968: 1961: 1948: 1938: 1919: 1918: 1914: 1907: 1888: 1880: 1876: 1869: 1862: 1857: 1840: 1831: 1786: 1753: 1749: 1724: 1720: 1708:and reflection 1694: 1654: 1629: 1602: 1553: 1541: 1539:Semi-major axis 1490: 1486: 1472: 1458: 1446: 1417: 1413: 1402: 1352: 1333: 1324: 1308:rotation period 1273: 1219:S-type asteroid 1215: 1207:Ejecta blankets 1155: 1139:Townsend Dorsum 1124: 1064: 1029: 1000: 999: 998: 997: 996: 993: 985: 984: 981: 970: 918:S-type asteroid 893: 888: 887: 886: 885: 884: 881: 873: 872: 869: 861: 860: 855: 854: 841: 840: 827: 826: 813: 812: 799: 798: 785: 784: 783: 779: 773: 699: 691: 670:David J. Tholen 635:Greek mythology 615: 562:S-type asteroid 520: 503: 481: 469: 456: 453:right ascension 451: 441: 429: 416: 393: 353: 341: 319: 307: 294: 272: 268: 266:Semi-major axis 256: 242: 189: 185: 167: 153: 129: 125: 114: 63: 35: 28: 23: 22: 18:Celmis (crater) 15: 12: 11: 5: 5247: 5245: 5237: 5236: 5231: 5226: 5221: 5216: 5211: 5206: 5201: 5196: 5191: 5181: 5180: 5174: 5173: 5161: 5149: 5137: 5125: 5102: 5101: 5099: 5098: 5093: 5086: 5084:242 Kriemhild 5080: 5077: 5076: 5071: 5069: 5068: 5061: 5054: 5046: 5038: 5037: 5036: 5035: 4993:Close approach 4974: 4973: 4972: 4926: 4918: 4917:External links 4915: 4913: 4912: 4888: 4864: 4844: 4805: 4766: 4735: 4700: 4663: 4645: 4606: 4589: 4572: 4547: 4515:"1993 (243) 1" 4509: 4507: 4504: 4502: 4501: 4480: 4460: 4435: 4417: 4400: 4377: 4359: 4344: 4338: 4324:Lewis, John S. 4320: 4314: 4297: 4291: 4278: 4260: 4244: 4242: 4239: 4237: 4236: 4218:(3): 355–416. 4207: 4179:(3): 479–483. 4164: 4097: 4062: 4029:(1): 119–139. 4011: 3983:(1): 177–197. 3972: 3967:10.1086/117037 3937: 3932:10.1086/117036 3902: 3881: 3830: 3795: 3762:(1): 106–118. 3744: 3723: 3690:(1): 140–157. 3672: 3646:(1–4): 23–78. 3635: 3588: 3570:(6): 699–725. 3559: 3538: 3517: 3496: 3449: 3406: 3359: 3320: 3289: 3287: 3284: 3282: 3279: 3276: 3275: 3263: 3251: 3239: 3227: 3215: 3203: 3192:on 1 July 2015 3177: 3162: 3147: 3130: 3115: 3101: 3086: 3070: 3053: 3040: 3006: 2994: 2992:, p. 1595 2982: 2963: 2951: 2936: 2924: 2902: 2887: 2875: 2863: 2848: 2836: 2824: 2810: 2798: 2786: 2772: 2760: 2749: 2747:, p. 1385 2734: 2717: 2702: 2687: 2675: 2663: 2651: 2639: 2623: 2606: 2589: 2570: 2558: 2546: 2534: 2509: 2492: 2472: 2445: 2433: 2421: 2419:, p. 2293 2409: 2394: 2379: 2346: 2334: 2326:, p. 215 2316: 2304: 2289: 2277: 2265: 2246: 2234: 2232:, p. 2295 2222: 2210: 2203:, p. 404 2193: 2181: 2164: 2146: 2134: 2122: 2110: 2091: 2072: 2055: 2035: 1992: 1977: 1966: 1946: 1912: 1886: 1874: 1859: 1858: 1856: 1853: 1852: 1851: 1846: 1839: 1836: 1830: 1829:Age and origin 1827: 1785: 1782: 1693: 1690: 1684:who inhabited 1653: 1650: 1646:prograde orbit 1625:Main article: 1621: 1620: 1617: 1616: 1613: 1607: 1606: 1603: 1598: 1595: 1594: 1593:1.6×1.4×1.2 km 1591: 1585: 1584: 1578: 1577: 1574: 1568: 1567: 1564: 1558: 1557: 1554: 1549: 1546: 1545: 1542: 1537: 1534: 1533: 1527: 1526: 1483: 1477: 1476: 1473: 1468: 1465: 1464: 1459: 1456: 1453: 1452: 1411: 1407: 1406: 1403: 1398: 1395: 1394: 1390: 1389: 1386: 1382: 1381: 1375: 1369: 1368: 1365: 1359: 1358: 1354: 1353: 1346: 1332: 1329: 1323: 1320: 1285:Koronis family 1272: 1269: 1214: 1211: 1195:prime meridian 1160:Koronis family 1154: 1151: 1123: 1120: 1063: 1060: 1028: 1025: 994: 987: 986: 982: 975: 974: 973: 972: 971: 969: 966: 902:NEAR Shoemaker 892: 889: 882: 875: 874: 870: 863: 862: 774: 767: 766: 765: 764: 763: 722:Space Shuttle 698: 692: 690: 687: 655:Koronis family 614: 611: 542:Koronis family 529: 528: 525: 524: 521: 513: 510: 509: 504: 499: 496: 495: 492: 486: 485: 482: 477: 474: 473: 470: 464: 461: 460: 457: 449: 446: 445: 442: 437: 434: 433: 430: 424: 421: 420: 417: 411: 408: 407: 404: 398: 397: 394: 389: 386: 385: 382: 376: 375: 369: 368: 365: 358: 357: 354: 349: 346: 345: 342: 337: 334: 333: 330: 324: 323: 320: 315: 312: 311: 308: 302: 299: 298: 295: 290: 287: 286: 283: 277: 276: 269: 264: 261: 260: 253: 247: 246: 239: 233: 232: 227:31 July 2016 ( 221: 220: 214: 213: 184:Idean (Idæan) 182: 176: 175: 172:Koronis family 168: 163: 160: 159: 154: 151: 148: 147: 123: 119: 118: 115: 110: 107: 106: 102: 101: 98: 94: 93: 88: 82: 81: 76: 70: 69: 65: 64: 48: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 5246: 5235: 5232: 5230: 5227: 5225: 5222: 5220: 5217: 5215: 5212: 5210: 5207: 5205: 5202: 5200: 5197: 5195: 5192: 5190: 5187: 5186: 5184: 5177: 5172: 5162: 5160: 5150: 5148: 5138: 5136: 5131: 5126: 5124: 5114: 5110: 5097: 5094: 5092: 5091: 5087: 5085: 5082: 5081: 5078: 5074: 5067: 5062: 5060: 5055: 5053: 5048: 5047: 5044: 5040: 5034: 5030: 5026: 5022: 5018: 5017:Orbit diagram 5014: 5010: 5006: 5002: 4998: 4994: 4991: 4988: 4984: 4983: 4978: 4975: 4971: 4967: 4963: 4959: 4955: 4951: 4947: 4943: 4939: 4936: 4935: 4934: 4930: 4927: 4924: 4921: 4920: 4916: 4901: 4897: 4893: 4889: 4877: 4873: 4869: 4865: 4853: 4849: 4845: 4830: 4826: 4822: 4819:: 1385–1386. 4818: 4811: 4806: 4791: 4787: 4783: 4779: 4772: 4767: 4752: 4748: 4741: 4736: 4734: 4730: 4727: 4714: 4710: 4706: 4701: 4689: 4685: 4681: 4677: 4673: 4669: 4664: 4660: 4656: 4652: 4646: 4631: 4627: 4623: 4619: 4612: 4607: 4603: 4599: 4595: 4590: 4586: 4582: 4578: 4573: 4561: 4557: 4553: 4548: 4536: 4532: 4528: 4524: 4520: 4516: 4511: 4510: 4505: 4487: 4483: 4477: 4473: 4466: 4461: 4457: 4453: 4449: 4445: 4441: 4436: 4424: 4420: 4414: 4410: 4406: 4401: 4389: 4385: 4384: 4378: 4366: 4362: 4356: 4352: 4351: 4345: 4341: 4335: 4331: 4330: 4325: 4321: 4317: 4311: 4306: 4305: 4298: 4294: 4288: 4284: 4279: 4267: 4263: 4257: 4253: 4252: 4246: 4245: 4240: 4233: 4229: 4225: 4221: 4217: 4213: 4208: 4204: 4200: 4195: 4190: 4186: 4182: 4178: 4174: 4170: 4165: 4150: 4146: 4142: 4138: 4134: 4130: 4126: 4122: 4118: 4114: 4110: 4103: 4098: 4093: 4088: 4084: 4080: 4076: 4072: 4068: 4063: 4048: 4044: 4040: 4036: 4032: 4028: 4024: 4017: 4012: 4008: 4004: 3999: 3994: 3990: 3986: 3982: 3978: 3973: 3968: 3963: 3959: 3955: 3951: 3947: 3943: 3938: 3933: 3928: 3924: 3920: 3916: 3912: 3908: 3903: 3899: 3895: 3891: 3887: 3882: 3867: 3863: 3859: 3855: 3851: 3848:(1): 87–105. 3847: 3843: 3836: 3831: 3826: 3821: 3817: 3813: 3809: 3805: 3801: 3796: 3781: 3777: 3773: 3769: 3765: 3761: 3757: 3750: 3745: 3741: 3737: 3733: 3729: 3724: 3709: 3705: 3701: 3697: 3693: 3689: 3685: 3678: 3673: 3669: 3665: 3661: 3657: 3653: 3649: 3645: 3641: 3636: 3624: 3619: 3614: 3610: 3606: 3602: 3598: 3594: 3589: 3585: 3581: 3577: 3573: 3569: 3565: 3560: 3556: 3552: 3548: 3544: 3539: 3535: 3531: 3527: 3523: 3518: 3514: 3510: 3506: 3502: 3497: 3482: 3478: 3474: 3470: 3466: 3462: 3461:Asteroids III 3455: 3450: 3446: 3442: 3437: 3432: 3428: 3424: 3420: 3416: 3412: 3407: 3392: 3388: 3384: 3380: 3376: 3372: 3371:Asteroids III 3365: 3360: 3345: 3341: 3337: 3333: 3332:Asteroids III 3326: 3321: 3317: 3313: 3309: 3305: 3301: 3297: 3291: 3290: 3285: 3280: 3273:, p. 182 3272: 3267: 3264: 3261:, p. 116 3260: 3255: 3252: 3249:, p. 193 3248: 3243: 3240: 3237:, p. 188 3236: 3231: 3228: 3225:, p. 195 3224: 3219: 3216: 3213:, p. 179 3212: 3207: 3204: 3191: 3187: 3181: 3178: 3175:, p. 455 3174: 3169: 3167: 3163: 3160:, p. 463 3159: 3154: 3152: 3148: 3144: 3139: 3134: 3131: 3127: 3126:Schmadel 2003 3122: 3120: 3116: 3113: 3108: 3106: 3102: 3099:, p. 108 3098: 3093: 3091: 3087: 3084: 3079: 3077: 3075: 3071: 3068:, p. 177 3067: 3062: 3060: 3058: 3054: 3050: 3044: 3041: 3036: 3028: 3024: 3023: 3017: 3010: 3007: 3004:, p. 878 3003: 2998: 2995: 2991: 2986: 2983: 2980:, p. 117 2979: 2974: 2972: 2970: 2968: 2964: 2961:, p. 134 2960: 2955: 2952: 2949:, p. 135 2948: 2943: 2941: 2937: 2933: 2928: 2925: 2921: 2919: 2912:, p. 89 2911: 2906: 2903: 2900:, p. 480 2899: 2894: 2892: 2888: 2885:, p. 155 2884: 2879: 2876: 2873:, p. 128 2872: 2867: 2864: 2861:, p. 124 2860: 2855: 2853: 2849: 2845: 2840: 2837: 2834:, p. 393 2833: 2828: 2825: 2822: 2817: 2815: 2811: 2807: 2802: 2799: 2795: 2790: 2787: 2784: 2779: 2777: 2773: 2770:, p. 131 2769: 2764: 2761: 2758: 2753: 2750: 2746: 2741: 2739: 2735: 2731: 2726: 2724: 2722: 2718: 2715:, p. 132 2714: 2709: 2707: 2703: 2700:, p. 141 2699: 2694: 2692: 2688: 2684: 2679: 2676: 2673:, p. 701 2672: 2667: 2664: 2661:, p. 470 2660: 2655: 2652: 2648: 2643: 2640: 2637: 2632: 2630: 2628: 2624: 2620: 2615: 2613: 2611: 2607: 2604:, p. 363 2603: 2598: 2596: 2594: 2590: 2586: 2581: 2579: 2577: 2575: 2571: 2567: 2562: 2559: 2556:, p. 142 2555: 2550: 2547: 2543: 2538: 2535: 2532:, p. 496 2531: 2526: 2524: 2522: 2520: 2518: 2516: 2514: 2510: 2507:, p. 710 2506: 2501: 2499: 2497: 2493: 2490: 2485: 2483: 2481: 2479: 2477: 2473: 2470:, p. 709 2469: 2464: 2462: 2460: 2458: 2456: 2454: 2452: 2450: 2446: 2443:, p. 238 2442: 2437: 2434: 2430: 2425: 2422: 2418: 2413: 2410: 2407:, p. 469 2406: 2401: 2399: 2395: 2392:, p. 237 2391: 2386: 2384: 2380: 2377:, p. 707 2376: 2371: 2369: 2367: 2365: 2363: 2361: 2359: 2357: 2355: 2353: 2351: 2347: 2344:, p. 358 2343: 2338: 2335: 2331: 2325: 2320: 2317: 2314:, p. 120 2313: 2308: 2305: 2301: 2296: 2294: 2290: 2286: 2281: 2278: 2274: 2269: 2266: 2263:, p. 699 2262: 2257: 2255: 2253: 2251: 2247: 2243: 2238: 2235: 2231: 2226: 2223: 2220:, p. 410 2219: 2214: 2211: 2207: 2202: 2197: 2194: 2190: 2185: 2182: 2179:, p. 700 2178: 2173: 2171: 2169: 2165: 2162: 2157: 2155: 2153: 2151: 2147: 2144:, p. 241 2143: 2138: 2135: 2131: 2130:Schmadel 2003 2126: 2123: 2120:, p. 206 2119: 2114: 2111: 2108:, p. 479 2107: 2102: 2100: 2098: 2096: 2092: 2088: 2083: 2081: 2079: 2077: 2073: 2070:, p. 147 2069: 2064: 2062: 2060: 2056: 2053: 2048: 2046: 2044: 2042: 2040: 2036: 2031: 2027: 2023: 2019: 2015: 2011: 2007: 2003: 1996: 1993: 1990:, p. 486 1989: 1984: 1982: 1978: 1975: 1970: 1967: 1964: 1959: 1957: 1955: 1953: 1951: 1947: 1942: 1934: 1930: 1929: 1923: 1916: 1913: 1910: 1905: 1903: 1901: 1899: 1897: 1895: 1893: 1891: 1887: 1884: 1878: 1875: 1872: 1867: 1865: 1861: 1854: 1850: 1847: 1845: 1842: 1841: 1837: 1835: 1828: 1826: 1822: 1820: 1816: 1811: 1807: 1803: 1799: 1790: 1783: 1781: 1777: 1745: 1717: 1715: 1711: 1707: 1702: 1700: 1691: 1689: 1687: 1683: 1679: 1675: 1670: 1668: 1663: 1659: 1651: 1649: 1647: 1642: 1638: 1634: 1628: 1627:Dactyl (moon) 1618: 1614: 1612: 1608: 1604: 1601: 1596: 1592: 1590: 1586: 1583: 1579: 1575: 1573: 1569: 1565: 1563: 1559: 1555: 1552: 1547: 1543: 1540: 1535: 1532: 1528: 1523: 1484: 1482: 1478: 1474: 1471: 1466: 1463: 1460: 1454: 1451: 1450: 1441: 1412: 1410:Pronunciation 1408: 1404: 1401: 1396: 1391: 1387: 1383: 1379: 1376: 1374: 1370: 1366: 1364: 1360: 1355: 1350: 1344: 1339: 1330: 1328: 1321: 1319: 1317: 1313: 1309: 1305: 1300: 1298: 1294: 1290: 1289:asteroid-belt 1286: 1277: 1270: 1268: 1266: 1265: 1259: 1257: 1252: 1248: 1244: 1240: 1236: 1232: 1228: 1224: 1220: 1212: 1210: 1208: 1204: 1198: 1196: 1191: 1187: 1186: 1181: 1177: 1168: 1164: 1161: 1152: 1150: 1146: 1144: 1140: 1135: 1133: 1129: 1121: 1119: 1112: 1108: 1104: 1102: 1098: 1094: 1090: 1085: 1083: 1079: 1075: 1074:impact events 1071: 1070: 1061: 1059: 1057: 1056: 1055:ejecta blocks 1051: 1046: 1038: 1033: 1026: 1024: 1022: 1018: 1012: 1010: 1005: 991: 979: 967: 965: 963: 954: 949: 945: 942: 937: 935: 931: 927: 923: 919: 914: 912: 908: 904: 903: 898: 890: 879: 867: 858: 243 Ida 852: 847: 838: 833: 824: 819: 810: 805: 796: 791: 778: 775:Animation of 771: 762: 760: 756: 752: 747: 744: 740: 738: 734: 730: 726: 725: 719: 714: 710: 709: 704: 696: 693: 688: 686: 684: 680: 676: 671: 667: 662: 660: 656: 652: 648: 644: 640: 636: 632: 628: 624: 620: 619:Johann Palisa 612: 610: 608: 603: 599: 594: 592: 588: 583: 580: 575: 573: 569: 568: 563: 559: 555: 551: 550:Johann Palisa 547: 546:asteroid belt 543: 539: 535: 526: 522: 519: 518: 511: 508: 505: 502: 501:Spectral type 497: 493: 491: 487: 483: 480: 475: 471: 468: 462: 458: 454: 447: 443: 440: 435: 431: 428: 422: 418: 415: 409: 405: 403: 399: 395: 392: 387: 383: 381: 377: 374: 370: 366: 364: 359: 355: 352: 347: 343: 340: 335: 331: 329: 325: 321: 318: 313: 309: 306: 305:orbital speed 300: 296: 293: 288: 284: 282: 278: 270: 267: 262: 254: 252: 248: 240: 238: 234: 230: 226: 222: 219: 215: 210: 183: 181: 177: 173: 169: 166: 161: 158: 155: 149: 144: 124: 122:Pronunciation 120: 116: 113: 108: 103: 99: 95: 92: 89: 87: 83: 80: 79:Johann Palisa 77: 75: 71: 66: 61: 57: 53: 52: 46: 41: 33: 19: 5176: 5171:Solar System 5088: 5039: 5028: 5020: 5012: 5004: 4996: 4980: 4965: 4957: 4954:Orbital info 4949: 4941: 4932: 4904:. Retrieved 4880:. Retrieved 4876:the original 4856:. Retrieved 4836:. Retrieved 4816: 4797:. Retrieved 4777: 4758:. Retrieved 4751:the original 4746: 4717:. Retrieved 4713:the original 4708: 4692:. Retrieved 4675: 4672:IAU Circular 4671: 4650: 4637:. Retrieved 4630:the original 4618:Science News 4617: 4594:Science News 4593: 4576: 4564:. Retrieved 4560:the original 4555: 4539:. Retrieved 4522: 4519:IAU Circular 4518: 4493:. Retrieved 4486:the original 4471: 4448:1721.1/11867 4439: 4427:. Retrieved 4408: 4392:. Retrieved 4382: 4369:. Retrieved 4349: 4328: 4303: 4282: 4270:. Retrieved 4250: 4215: 4211: 4176: 4172: 4156:. Retrieved 4112: 4108: 4077:(1): 20–32. 4074: 4070: 4054:. Retrieved 4047:the original 4026: 4022: 3980: 3976: 3949: 3945: 3914: 3910: 3889: 3885: 3873:. Retrieved 3866:the original 3845: 3841: 3807: 3803: 3787:. Retrieved 3759: 3755: 3731: 3727: 3715:. Retrieved 3687: 3683: 3643: 3639: 3627:. Retrieved 3603:(1): 77–86. 3600: 3596: 3567: 3563: 3546: 3542: 3525: 3521: 3504: 3500: 3488:. Retrieved 3460: 3418: 3414: 3398:. Retrieved 3370: 3351:. Retrieved 3331: 3299: 3295: 3266: 3254: 3242: 3230: 3218: 3206: 3194:. Retrieved 3190:the original 3180: 3141: 3133: 3128:, p. 37 3048: 3043: 3020: 3009: 2997: 2985: 2954: 2934:, p. 21 2927: 2914: 2905: 2878: 2866: 2839: 2827: 2806:Chapman 1996 2801: 2789: 2763: 2752: 2732:, p. 97 2685:, p. 90 2678: 2671:Chapman 1996 2666: 2654: 2649:, p. 96 2642: 2621:, p. 10 2602:Chapman 1994 2587:, p. 58 2568:, p. 99 2561: 2549: 2537: 2530:Chapman 1995 2505:Chapman 1996 2468:Chapman 1996 2436: 2431:, p. 57 2424: 2412: 2375:Chapman 1996 2342:Chapman 1994 2337: 2328: 2319: 2307: 2302:, p. 36 2287:, p. 72 2280: 2275:, p. 24 2268: 2261:Chapman 1996 2244:, p. 26 2237: 2225: 2213: 2205: 2196: 2184: 2177:Chapman 1996 2137: 2132:, p. 36 2125: 2118:Ridpath 1897 2113: 2005: 2001: 1995: 1969: 1926: 1915: 1882: 1877: 1832: 1823: 1814: 1797: 1795: 1718: 1703: 1695: 1671: 1666: 1661: 1657: 1655: 1640: 1636: 1630: 1475:1993 (243) 1 1393:Designations 1377: 1348: 1325: 1301: 1282: 1264:megaregolith 1262: 1260: 1250: 1246: 1227:bulk density 1216: 1199: 1183: 1173: 1156: 1147: 1143:Vienna Regio 1142: 1138: 1136: 1131: 1127: 1125: 1116: 1110: 1086: 1077: 1067: 1065: 1053: 1042: 1036: 1020: 1013: 1001: 961: 958: 938: 925: 915: 900: 896: 894: 850: 836: 822: 808: 794: 789: 776: 748: 742: 741: 732: 723: 717: 706: 700: 694: 682: 663: 616: 601: 597: 595: 586: 584: 576: 565: 533: 532: 516: 396:15.7 km 317:Mean anomaly 281:Eccentricity 105:Designations 49: 5159:Outer space 5147:Spaceflight 4838:29 November 4678:(6082): 2. 4653:: 469–470. 4579:: 237–238. 4525:(5948): 2. 4495:29 November 4371:28 February 3564:Meteoritics 3543:Meteoritics 3522:Meteoritics 3507:: 357–365. 3463:: 485–500. 3421:(1): 1–19. 3334:: 463–484. 2959:Slivan 1995 2846:, p. 9 2745:Stooke 1997 2142:Berger 2003 1800:was in the 1748:and Celmis 1611:Temperature 1605:synchronous 1562:Inclination 1457:Named after 1258:of 11–42%. 1213:Composition 1185:Blue Grotto 891:Discoveries 689:Exploration 490:Temperature 467:declination 425:Equatorial 391:Mean radius 328:Inclination 170:Main belt ( 152:Named after 5183:Categories 4882:4 December 4858:24 October 4799:22 October 4760:23 October 4719:23 October 4566:23 October 4429:23 October 4158:23 October 4056:27 October 3892:(3): 108. 3875:27 October 3789:23 October 3629:27 October 3549:(5): 496. 3490:27 October 3400:23 October 3281:References 3112:Green 1994 3097:Mason 1994 3037:required.) 2910:Lewis 1996 2636:Cowen 1995 2324:Cowen 1993 1943:required.) 1810:pericenter 1699:spheroidal 1674:designated 1631:Ida has a 1589:Dimensions 1485:Dactylian 1481:Adjectives 1380:spacecraft 1176:lava tubes 1122:Structures 934:stony-iron 846:951 Gaspra 737:propellant 380:Dimensions 363:satellites 275:10 m) 259:10 m) 251:Perihelion 245:10 m) 231:2457600.5) 180:Adjectives 56:Pola Regio 5123:Astronomy 5009:Ephemeris 5001:Discovery 4938:Ephemeris 4626:0036-8423 4602:0036-8423 4203:129231326 3993:CiteSeerX 3734:: 57–67. 3668:122388506 3353:4 January 3302:(3): 46. 2161:NASA 2005 1909:Holm 1994 1871:Raab 2002 1686:Mount Ida 1652:Discovery 1367:Ann Harch 1357:Discovery 1316:precesses 1091:minerals 955:meteorite 932:(OC) and 743:Galileo's 733:Galileo's 310:0.2036°/d 117:(243) Ida 68:Discovery 5096:244 Sita 4906:15 April 4900:Archived 4852:Archived 4829:Archived 4790:Archived 4780:: 1381. 4729:Archived 4688:Archived 4639:26 March 4535:Archived 4456:32907677 4423:Archived 4388:Archived 4365:Archived 4326:(1996). 4266:Archived 4149:Archived 4137:12968171 3780:Archived 3717:26 March 3708:Archived 3623:Archived 3481:Archived 3445:51885221 3391:Archived 3373:: 3–15. 3344:Archived 3016:"dactyl" 2918:troilite 1963:JPL 2008 1838:See also 1806:prograde 1714:regolith 1256:porosity 1243:feldspar 1235:pyroxene 1132:region 2 1128:region 1 1097:pyroxene 1089:silicate 1069:regolith 1062:Regolith 1050:regolith 1045:cratered 727:mission 724:Atlantis 677:and the 538:asteroid 356:110.961° 344:324.016° 303:Average 237:Aphelion 5109:Portals 5090:243 Ida 4979:at the 4977:243 Ida 4929:243 Ida 4821:Bibcode 4782:Bibcode 4726:Alt URL 4680:Bibcode 4655:Bibcode 4581:Bibcode 4527:Bibcode 4220:Bibcode 4181:Bibcode 4145:4367378 4117:Bibcode 4079:Bibcode 4031:Bibcode 3985:Bibcode 3954:Bibcode 3919:Bibcode 3894:Bibcode 3850:Bibcode 3812:Bibcode 3764:Bibcode 3736:Bibcode 3692:Bibcode 3648:Bibcode 3605:Bibcode 3572:Bibcode 3551:Bibcode 3530:Bibcode 3528:: 455. 3509:Bibcode 3465:Bibcode 3423:Bibcode 3375:Bibcode 3336:Bibcode 3304:Bibcode 3196:18 July 3051:, p. 42 2030:4333634 2010:Bibcode 1922:"Idæan" 1815:Galileo 1798:Galileo 1710:spectra 1706:albedos 1682:dactyls 1667:Galileo 1662:Galileo 1658:Galileo 1641:Galileo 1462:Dactyls 1378:Galileo 1349:Galileo 1306:with a 1297:Jupiter 1251:Galileo 1247:Galileo 1231:olivine 1153:Craters 1111:Galileo 1093:olivine 1078:Galileo 1037:Galileo 1021:Galileo 962:Galileo 926:Galileo 907:geology 897:Galileo 830: 804:Jupiter 790:Galileo 777:Galileo 718:Galileo 708:Galileo 703:Jupiter 695:Galileo 683:Galileo 621:at the 602:Galileo 598:Galileo 591:Dactyls 587:Galileo 572:Jupiter 567:Galileo 544:of the 540:in the 534:243 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