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Rhea (moon)

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1009: 1141: 4703: 1129: 835: 5849: 944: 3537: 45: 5775: 959:) on the trailing hemisphere (the side facing away from the direction of motion along Rhea's orbit) and a very faint "line" of material at Rhea's equator that may have been deposited by material deorbiting from its rings. Rhea has two very large impact basins on its hemisphere facing away from Saturn, which are about 400 and 500 km across. The more northerly and less degraded of the two, called 3323: 6139: 4697: 6163: 4709: 6115: 6151: 6127: 866:, the second-largest moon of Uranus, has almost the same size, but is significantly denser than Rhea (1.63 vs 1.24) and thus more massive, although Rhea is slightly larger by volume. The surface area of the moon can be estimated at 7,330,000 square kilometres (2,830,000 sq mi), similar to Australia (7,688,287 km). 1218:, but were thought to be denser nearer the moon, with three narrow rings of higher density. The case for a ring was strengthened by the subsequent finding of the presence of a set of small ultraviolet-bright spots distributed along Rhea's equator (interpreted as the impact points of deorbiting ring material). However, when 1039:. It has been theorized that these cratered plains are up to four billion years old on average. On the trailing hemisphere there is a network of bright swaths on a dark background, and fewer craters. It is believed, based on data from the Cassini probe, that these are tectonic features: depressions ( 1026:
density; the first area contains craters which are larger than 40 km in diameter, whereas the second area, in parts of the polar and equatorial regions, has only craters under that size. This suggests that a major resurfacing event occurred some time during its formation. The leading hemisphere
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coefficient was 0.4. Such a value indicated that Rhea had an almost homogeneous interior (with some compression of ice in the center) while the existence of a rocky core would imply a moment of inertia of about 0.34. In the same year another paper claimed the moment of inertia was about 0.37. Rhea
858:(a high-pressure and extra-low temperature form of ice) is believed, based on the moon's temperature profile, to start around 350 to 450 kilometres (220 to 280 mi) beneath the surface. Rhea is 1,528 kilometres (949 mi) in diameter, but is still only a third of the size of 898:
radio Doppler data used in the analysis, but after restricting the analysis to a subset of data obtained closest to the moon, he arrived at his old result that Rhea was in hydrostatic equilibrium and had a moment of inertia of about 0.4, again implying a homogeneous interior.
940:, with distinct and dissmillar leading and trailing hemispheres, suggesting similar composition and histories. The temperature on Rhea is 99 K (−174 °C) in direct sunlight and between 73 K (−200 °C) and 53 K (−220 °C) in the shade. 1257:
passed Rhea at a distance of 500 km on November 26, 2005; at a distance of 5,750 km on August 30, 2007; at a distance of 100 km on March 2, 2010; at 69 km flyby on January 11, 2011; and a last flyby at 992 km on March 9, 2013.
1128: 1140: 1102:, a similar process to that believed to have formed the planets in the Solar System. As the young giant planets formed, they were surrounded by discs of material that gradually coalesced into moons. However, a model proposed by 894:, meaning that the moment of inertia cannot be determined from the gravity data alone. In 2008 an author of the first paper tried to reconcile these three disparate results. He concluded that there is a systematic error in the 1209:
announced that Rhea may have a weak ring system. This would mark the first discovery of rings around a moon. The rings' existence was inferred by observed changes in the flow of electrons trapped by Saturn's magnetic field as
1175:. It consists of oxygen and carbon dioxide in proportion of roughly 5 to 2. The surface density of the exosphere is from 10 to 10 molecules in a cubic centimeter, depending on local temperature. The main source of oxygen is 617:
The moon itself has a fairly low density, composed of roughly three-quarters ice and only one-quarter rock. The surface of Rhea is heavily cratered, with distinct leading and trailing hemispheres. Like the moon
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made targeted observations of the putative ring plane from several angles, there was no evidence of ring material found, suggesting that another explanation for the earlier observations is needed.
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Teolis, B. D.; Jones, G. H.; Miles, P. F.; Tokar, R. L.; Magee, B. A.; Waite, J. H.; Roussos, E.; Young, D. T.; Crary, F. J.; Coates, A. J.; Johnson, R. E.; Tseng, W. L.; Baragiola, R. A. (2010).
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Thomas, P. C.; Burns, J. A.; Helfenstein, P.; Squyres, S.; Veverka, J.; Porco, C.; Turtle, E. P.; McEwen, A.; Denk, T.; Giesef, B.; Roatschf, T.; Johnsong, T. V.; Jacobsong, R. A. (October 2007).
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Iess, L.; Rappaport, N.; Tortora, P.; Lunine, Jonathan I.; Armstrong, J.; Asmar, S.; Somenzi, L.; Zingoni, F. (2007). "Gravity field and interior of Rhea from Cassini data analysis".
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An extract of the Journal Des Scavans. of April 22 ft. N. 1686. giving an account of two new satellites of Saturn, discovered lately by Mr. Cassini at the Royal Observatory at Paris
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systems and craters with uplifted bases (so-called "relaxed" craters), although the latter is apparently only present in large craters more than 100 km (62 mi) across.
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Wagner, R.J.; Neukum, G.; et al. (2008). "Geology of Saturn's Satellite Rhea on the Basis of the High-Resolution Images from the Targeted Flyby 049 on Aug. 30, 2007".
6193: 6188: 1366:, Titan, Triton, Titania, and Oberon. Oberon, Uranus's second-largest moon, has a radius that is ~0.4% smaller than Rhea's, but a density that is ~26% greater. See 1005:– asymmetrical blankets of ejected particles surrounding impact craters – are not present on Rhea, potentially another result of the moon's low surface gravity. 3182: 1134:
Image of the wispy hemisphere, showing ice cliffs – Powehiwehi (upper center); chasmata stretch from upper left to right center – Onokoro Catenae (lower right)
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Elowitz, Mark; Sivaraman, Bhalamurugan; Hendrix, Amanda; Lo, Jen-Iu; Chou, Sheng-Lung; Cheng, Bing-Ming; Sekhar, B. N. Raja; Mason, Nigel J. (2021-01-22).
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of about 1.236 g/cm. This low density indicates that it is made of ~25% rock (density ~3.25 g/cm) and ~75% water ice (density ~0.93 g/cm). A layer of
3268: 975:, is nicknamed "The Splat", and may be one of the youngest craters on the inner moons of Saturn. This was hypothesized in a 2007 paper published by 1517: 1439: 5848: 2981: 976: 583: 3238: 5811: 5658: 4615: 3471: 3355: 2550: 2042: 2015: 2005: 1800: 1558: 6203: 2873: 2490:"The anatomy of fresh complex craters on the mid-sized icy moons of Saturn and self-secondary cratering at the rayed crater Inktomi (Rhea)" 3312: 3126:
Matthew S. Tiscareno; Joseph A. Burns; Jeffrey N. Cuzzi; Matthew M. Hedman (2010). "Cassini imaging search rules out rings around Rhea".
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for the water–ammonia system. More recent indications are that Rhea has a homogeneous interior and hence that this ocean does not exist.
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ice cliffs that appear as bright wispy streaks visible from space. The surface temperature varies between −174 °C and −220 °C.
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Verbiscer, A.; French, R.; Showalter, M.; Helfenstein, P. (9 February 2007). "Enceladus: Cosmic Graffiti Artist Caught in the Act".
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Roatsch, T.; Jaumann, R.; Stephan, K.; Thomas, P. C. (2009). "Cartographic Mapping of the Icy Satellites Using ISS and VIMS Data".
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White, Oliver L.; Schenk, Paul M.; Bellagamba, Anthony W.; Grimm, Ashley M.; Dombard, Andrew J.; Bray, Veronica J. (2017-05-15).
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Schenk, Paul M.; McKinnon, W. B. (2009). "Global Color Variations on Saturn's Icy Satellites, and New Evidence for Rhea's Ring".
66: 5691: 1954: 3410: 191: 2652:"Tectonic features on Rhea's trailing hemisphere: a first look at the Cassini ISS camera data from orbit 121, Nov. 21, 2009" 1581:"The Orbits of the Main Saturnian Satellites, the Saturnian System Gravity Field, and the Orientation of Saturn's Pole" 4571: 3674: 6105: 3093: 971:, which extend up to 400 km (250 mi) away from the crater, across most of one hemisphere. This crater, called 4702: 3638: 3433: 3128: 2166: 1277: 1122:
between pre-existing moons, and Rhea and Iapetus are thought to have formed from part of the debris of these collisions.
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Rhea has some evidence of endogenic activity – that is, activity originating from within the moon, such as heating and
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Anderson, J. D.; Rappaport, N. J.; Giampieri, G.; et al. (2003). "Gravity field and interior structure of Rhea".
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rotating at Rhea's angular velocity. Modelling in 2006 suggested that Rhea could be barely capable of sustaining an
5319: 4717: 4650: 4576: 4566: 1272: 967:. There is a 48 km-diameter impact crater at 112°W that is prominent because of an extended system of bright 862:, Saturn's biggest moon. Although Rhea is the ninth-largest moon, it is only the tenth-most massive moon. Indeed, 5804: 3551: 3464: 3390: 656: 630: 71: 2536: 2343:"Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects" 6198: 5751: 5413: 5344: 3667: 1585: 998: 881:
orbiter in 2005 cast this into doubt. In a paper published in 2007 it was claimed that the axial dimensionless
397: 1001:, compared to Ganymede's 1.428 m/s and Callisto's 1.235 m/s) and a stiffer crust of ice. Similarly, 813:
at the same speed it revolves (orbits), so one hemisphere is always facing towards Saturn. This is called the
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Moore, Jeffrey M.; Schenk, Paul M.; Bruesch, Lindsey S.; Asphaug, Erik; McKinnon, William B. (October 2004).
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mission, it was assumed that Rhea had a rocky core. However, measurements taken during a close flyby by the
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A spectroscopic study of the surfaces of Saturn's large satellites: H2O ice, tholins, and minor constituents
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Aponte-Hernández, Betzaida; Rivera-Valentín, Edgard G.; Kirchoff, Michelle R.; Schenk, Paul M. (Dec 2012).
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Atmospheres in boldface are significant atmospheres; atmospheres in italics are unconfirmed atmospheres.
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of simple compounds containing carbon, nitrogen and hydrogen. The trailing side of Rhea's surface is
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that the names of the Titans, sisters and brothers of Kronos (Saturn, in Roman mythology), be used.
642: 51: 6167: 6012: 5952: 5938: 5878: 5871: 5423: 5324: 4873: 4822: 3246: 2604: 799: 674: 638: 254: 2134: 821:; the other side is the trailing hemisphere, which faces backwards relative to the moon's motion. 6155: 6143: 6085: 5885: 5837: 5698: 5121: 5015: 3163: 3137: 3036: 2963: 2680: 1979: 1832: 1748: 1620: 1043:) and troughs, with ice-covered cliff sides causing the lines' whiteness (more technically their 903: 818: 709: 529: 3401: 2650:
Wagner, R. J.; Giese, B.; Roatsch, T.; Neukum, G.; Denk, T.; Wolf, U.; Porco, C. C. (May 2010).
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surface, with the exceptions of a few large Dione-type chasmata or fractures (formerly known as
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being either partially or fully differentiated would be consistent with the observations of the
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Jones, G. H.; et al. (2008-03-07). "The Dust Halo of Saturn's Largest Icy Moon, Rhea".
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Schenk, Paul; Kirchoff, Michelle; Hoogenboom, Trudi; Rivera-Valentín, Edgard (2020).
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was targeted at the Saturn system; in total it took more than 450 thousand images.
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of less than a degree, inclined by only 0.35° from Saturn's equatorial plane.
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that Cassini discovered, and the third moon discovered around Saturn overall.
452: 2926:"Cassini Finds an Oxygen–Carbon Dioxide Atmosphere at Saturn's Icy Moon Rhea" 2859: 2828:"Impact crater relaxation on Dione and Tethys and relation to past heat flow" 2794: 2735: 2636: 2521: 1975: 1616: 6053: 6039: 6030: 5996: 5726: 5719: 5526: 5238: 5168: 4881: 4855: 4792: 4696: 4043: 3831: 3594: 3587: 3024: 2950: 2925: 2582: 2560: 1991: 1818: 1736: 1632: 1458: 1184: 1172: 1056: 814: 779: 591: 5263: 5098: 3331:
was created from a revision of this article dated 29 October 2011
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Monthly Notices of the Royal Astronomical Society, Vol. 8, No. 3, pp. 42–43
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Its surface can be divided into two geologically different areas based on
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probe. A year later yet another paper claimed that the moon may not be in
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View of Rhea's leading hemisphere with crater Inktomi and its prominent
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are more crisply defined than the flatter craters that are pervasive on
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Julie Castillo-Rogez (17 November 2006). "Internal structure of Rhea".
851: 663:. Cassini named the four moons he discovered (Tethys, Dione, Rhea, and 364: 1768: 659:
on 23 December 1672, with a 10.4-metre (34 ft) telescope made by
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for which precise measurements have confirmed a shape consistent with
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MacKenzie, R. A.; Iess, L.; Tortora, P.; Rappaport, N. J. (2008).
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Results of Astronomical Observations made at the Cape of Good Hope
611: 716:(being the fifth major moon going outward from the planet, after 602:. Rhea has a nearly circular orbit around Saturn, but it is also 5828: 5173: 4661: 1359: 1206: 1168: 1032: 843: 330: 5793: 5359: 4611: 3663: 3453: 2874:"Giant impact scenario may explain the unusual moons of Saturn" 2294:"Shapes of the saturnian icy satellites and their significance" 1792:
Babylon to Voyager and Beyond: A History of Planetary Astronomy
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are also flung onto the moon's leading hemisphere, coating it.
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Closeup showing two craters on Rhea's surface taken in 2013 by
5789: 3359: 2605:"Saturn's satellite Rhea is a homogeneous mix of rock and ice" 2162:"Saturn's satellite Rhea is a homogeneous mix of rock and ice" 1648:"Saturn's satellite Rhea is a homogeneous mix of rock and ice" 1171:
announced the discovery of an extremely tenuous atmosphere—an
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from the National Oceanic and Atmospheric Administration site
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Hussmann, Hauke; Sohl, Frank; Spohn, Tilman (November 2006).
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passed by Rhea. Dust and debris could extend out to Rhea's
2575:"Rhea – Overview | Planets – NASA Solar System Exploration" 2535:
Joseph A. Burns; Mildred Shapley Matthews (November 1986).
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orbiter, which was one part of the dual orbiter and lander
566: 121: 3269:"NASA craft snaps last close-up photos of icy Saturn moon" 918:; such an ocean would have to be at about 176 K, the 647:
orbiter in 2005, 2007, 2010, 2011, and once more in 2013.
5355: 3239:"Cassini Solstice Mission: Cassini Rocks Rhea Rendezvous" 963:, is roughly comparable in size to the basin Odysseus on 947:
Surface features on Rhea well defined due to the lighting
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Astronomers fell into the habit of referring to them and
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Proceedings of the fifteenth Lunar and Planetary Science
1047:). The extensive dark areas are thought to be deposited 1031:, the craters lack the high relief features seen on the 590:, with a surface area that is comparable to the area of 3449: 2704:"Possible detection of hydrazine on Saturn's moon Rhea" 1098:
The moons of Saturn are thought to have formed through
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shape of Rhea is consistent with a homogeneous body in
2387:"Large impact features on middle-sized icy satellites" 614:), so one hemisphere always faces towards the planet. 6103: 3699:
Listed in approximate increasing distance from Saturn
2769:"Morphometric Study of Craters on Saturn's Moon Rhea" 1326:
can be estimated, given the radius, with the formula
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of water ice at the surface via irradiation from the
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may also shine a new light on the origin of Rhea and
798:(0.001), meaning it is nearly circular. It has a low 3094:"Another possible piece of evidence for a Rhea ring" 557: 286:
1532.4 × 1525.6 × 1524.4 km
162: 112: 6063: 6029: 5962: 5923: 5856: 5827: 5738: 5667: 5646: 5442: 5406: 5134: 4767: 4716: 4649: 4526: 4077: 4067: 4014: 3965: 3949: 3915: 3905: 3814: 3786: 3765: 3727: 3704: 3631: 3611: 3572: 3565: 3544: 3515: 3494: 3487: 2380: 2378: 993:; it is theorized that this is due to a much lower 554: 527: 462: 450: 426: 414: 395: 380: 361: 329: 308: 290: 280: 275: 263: 253: 240: 219: 207: 189: 182: 159: 147: 132: 109: 100: 90: 85: 77: 65: 60: 2603:Anderson, J. D.; Schubert, G. (18 January 2007). 1694:Rhea's Gravitational Field and Internal Structure 1478:Moore et al. (1984) "The Geomorphology of Rhea", 1118:. In this model, Titan was formed in a series of 2155: 2153: 1905:"Rhea | 2nd Largest Moon of Saturn | Britannica" 1414: 1412: 1410: 1408: 1406: 1404: 1402: 1027:is heavily cratered and uniformly bright. As on 2105: 2103: 1687: 1685: 1683: 606:, like Saturn's other major moons; that is, it 3385:Images of Rhea at JPL's Planetary Photojournal 3322: 1574: 1572: 1570: 1440:"Pronouncing the names of the moons of Saturn" 1318: 1316: 1239:There were five close targeted fly-bys by the 5805: 5371: 4623: 3675: 3465: 2429: 2427: 2425: 2423: 8: 3417:(released December 2010) from Cassini images 2113:Physics of the Earth and Planetary Interiors 2084:"Area of Australia - States and Territories" 1862:"Planet and Satellite Names and Discoverers" 1310:Calculated on the basis of other parameters. 37: 2899:"Cassini Finds Ethereal Atmosphere at Rhea" 2201: 2199: 563: 168: 118: 30:Not to be confused with the asteroid named 5812: 5798: 5790: 5378: 5364: 5356: 4630: 4616: 4608: 4074: 3912: 3682: 3668: 3660: 3569: 3491: 3472: 3458: 3450: 1438:Consulmagno, G.; Ryche, H. (Feb 9, 1982). 1358:The moons more massive than Rhea are: the 1230:The first images of Rhea were obtained by 633:. Since then, it has been visited by both 43: 3404:basemaps (March 2012) from Cassini images 3141: 2949: 2802: 2784: 2743: 2276: 2266: 2187: 2133: 1671: 1606: 6194:Discoveries by Giovanni Domenico Cassini 3339:, and does not reflect subsequent edits. 2982:"Saturn's Moon Rhea Also May Have Rings" 2679:(PDF). Dale P. Cruikshank, Tobias Owen, 1769:"Classic Satellites of the Solar System" 6189:Astronomical objects discovered in 1672 6110: 1579:Robert. A. Jacobson (18 October 2022). 1512: 1510: 1508: 1506: 1398: 1303: 1124: 809:and rotates synchronously; that is, it 700:, the "mother of the gods" and wife of 3440:Saturn's moon Rhea has thin atmosphere 2160:Anderson, J. D.; Schubert, J. (2007). 1757:(supporting online material, table S1) 1646:Anderson, J. D.; Schubert, G. (2007). 1493:"Natural Satellites Ephemeris Service" 1341:Surface area derived from the radius ( 637:and was the subject of close targeted 36: 2697: 2695: 2693: 1856: 1854: 1767:Observatorio ARVAL (April 15, 2007). 1187:of the organics present in ice or to 7: 3360:NASA's Solar System Exploration site 3237:Cook, Jia-Rui C. (13 January 2011). 2687:, 175, pages: 268–283, 2 March 2005. 2082:Australia, Geoscience (2014-06-27). 1421:"Rhea: Saturn's dirty snowball moon" 1065:irradiated by Saturn's magnetosphere 762:Rhea was not named until 1847, when 2494:Meteoritics & Planetary Science 1866:Gazetteer of Planetary Nomenclature 1419:Tillman, Nola Taylor (2016-06-29). 932:List of geological features on Rhea 673:(the stars of Louis) to honor King 2031:Hobbs, Peter Victor (2010-05-06). 1868:. USGS Astrogeology. July 21, 2006 1523:National Space Science Data Center 951:Rhea has a rather typical heavily 936:Rhea's features resemble those of 830:Size, mass, and internal structure 610:with the same period it revolves ( 25: 3092:Lakdawalla, E. (5 October 2009). 3060:Discovers Possible Rings at Rhea" 1839:. NASA Science. December 19, 2019 1789:David Leverington (29 May 2003). 594:. It is the smallest body in the 55:imagery taken on 26 November 2005 6161: 6149: 6137: 6125: 6113: 5847: 5774: 5773: 4707: 4701: 4695: 3535: 3429:USGS planetary nomenclature page 3321: 3183:"The Moon Rings That Never Were" 1518:"Saturnian Satellite Fact Sheet" 1268:Former classification of planets 1139: 1127: 846:(left top), and Rhea (left down) 550: 155: 105: 6006: 3181:Kerr, Richard A. (2010-06-25). 1955:Journal of Geophysical Research 1692:Anderson, John D. (July 2008). 1072: 794:The orbit of Rhea has very low 774:and two other moons of Saturn, 629:Rhea was discovered in 1672 by 49:Mosaic of Rhea, assembled from 2988:. June 3, 2006. Archived from 1: 5659:Saturn-crossing minor planets 3436:, interactive map of the moon 3054:Lakdawalla, E. (2008-03-06). 2773:The Planetary Science Journal 2579:NASA Solar System Exploration 2463:American Astronomical Society 2144:10.1016/S0031-9201(03)00035-9 1837:NASA Solar System Exploration 1051:, which are a mix of complex 3129:Geophysical Research Letters 2852:10.1016/j.icarus.2017.01.025 2609:Geophysical Research Letters 2414:10.1016/j.icarus.2004.05.009 2369:10.1016/j.icarus.2006.06.005 2321:10.1016/j.icarus.2007.03.012 2247:Geophysical Research Letters 2228:10.1016/j.icarus.2007.03.027 2167:Geophysical Research Letters 1652:Geophysical Research Letters 1551:10.1007/978-1-4020-9217-6_24 6204:Moons with a prograde orbit 6081:Extraterrestrial atmosphere 3619:Titan Saturn System Mission 3425:Rhea map with feature names 3365:The Planetary Society: Rhea 2543:University of Arizona Press 2436:Lunar and Planetary Science 1543:Saturn from Cassini-Huygens 1249:mission. Launched in 1997, 1075:). Particles from Saturn's 978:Lunar and Planetary Science 912:internal liquid-water ocean 850:Rhea is an icy body with a 770:, discoverer of the planet 6220: 3245:. NASA/JPL. Archived from 3098:The Planetary Society Blog 3056:"A Ringed Moon of Saturn? 1273:List of natural satellites 1198: 929: 29: 6094: 5845: 5769: 5393: 5300: 4693: 4552: 3697: 3552:Giovanni Domenico Cassini 3533: 2656:EGU General Assembly 2010 1236:spacecraft in 1980–1981. 657:Giovanni Domenico Cassini 631:Giovanni Domenico Cassini 539: 483: 222:Orbital period (sidereal) 42: 5752:The Day the Earth Smiled 5152:: 5268 km / 0.413 Earths 2243:"A non-hydrostatic Rhea" 2010:. Elsevier. 2015-04-17. 1608:10.3847/1538-3881/AC90C9 1586:The Astronomical Journal 1387:More precisely, 0.3721. 1378:More precisely, 0.3911. 1191:of the moon's interior. 1055:generated on the ice by 825:Physical characteristics 712:. It is also designated 689:Rhea is named after the 574:) is the second-largest 398:Moment of inertia factor 276:Physical characteristics 3025:10.1126/science.1151524 2951:10.1126/science.1198366 2506:2020M&PS...55.2440S 1929:"Terms and Definitions" 1737:10.1126/science.1134681 1482:, Part 2, p C-791–C-794 1459:10.1029/EO063i006p00146 1181:magnetosphere of Saturn 908:hydrostatic equilibrium 892:hydrostatic equilibrium 677:. Rhea was the second 655:Rhea was discovered by 600:hydrostatic equilibrium 429:Synodic rotation period 184:Orbital characteristics 3317: 3297:Listen to this article 2901:. NASA. Archived from 2728:10.1126/sciadv.aba5749 2007:Treatise on Geophysics 1167:On November 27, 2010, 1019: 948: 847: 755:with the discovery of 3316: 2905:on September 16, 2011 2059:"Rhea - NASA Science" 1110:for the formation of 1011: 946: 837: 6071:Prebiotic atmosphere 5325:Planetary-mass moons 3348:More spoken articles 3160:10.1029/2010GL043663 2629:10.1029/2006GL028100 2268:10.1029/2007GL032898 2189:10.1029/2006GL028100 2088:Geoscience Australia 1968:10.1029/2004JE002379 1771:. Observatorio ARVAL 1673:10.1029/2006GL028100 1545:. pp. 763–781. 1195:Possible ring system 1086:activity: there are 920:eutectic temperature 3273:saturn.jpl.nasa.gov 3243:saturn.jpl.nasa.gov 3152:2010GeoRL..3714205T 3017:2008Sci...319.1380J 3011:(5868): 1380–1384. 2942:2010Sci...330.1813T 2936:(6012): 1813–1815. 2844:2017Icar..288...37W 2720:2021SciA....7.5749E 2664:2010EGUGA..12.6731W 2621:2007GeoRL..34.2202A 2475:2009DPS....41.0303S 2448:2008LPI....39.1930W 2406:2004Icar..171..421M 2361:2006Icar..185..258H 2313:2007Icar..190..573T 2259:2008GeoRL..35.5204M 2220:2007Icar..190..585I 2180:2007GeoRL..34.2202A 2126:2003PEPI..136..201A 1729:2007Sci...315..815V 1702:2008cosp...37...89A 1664:2007GeoRL..34.2202A 1599:2022AJ....164..199J 1497:Minor Planet Center 1150:just below center; 914:through heating by 838:Size comparison of 78:Discovery date 39: 6086:Stellar atmosphere 5964:Natural satellites 5761:(2018 documentary) 5305:Discovery timeline 4639:Natural satellites 3413:2013-04-24 at the 3378:2011-08-13 at the 3318: 3249:on 17 January 2011 2786:10.3847/psj/ac32d4 2681:Cristina Dalle Ore 2514:10.1111/maps.13592 1909:www.britannica.com 1894:(January 14, 1848) 1205:On March 6, 2008, 1020: 949: 848: 819:leading hemisphere 584:ninth-largest moon 530:Apparent magnitude 410:(disputed/unclear) 67:Discovered by 18:Atmosphere of Rhea 6101: 6100: 5787: 5786: 5759:In Saturn's Rings 5455: 5353: 5352: 5153: 4605: 4604: 4107: 4106: 4010: 4009: 3766:Other inner moons 3657: 3656: 3627: 3626: 3531: 3530: 3421:Rhea nomenclature 3314: 3102:Planetary Society 3068:Planetary Society 3064:www.planetary.org 2552:978-0-8165-0983-6 2500:(11): 2440–2460. 2044:978-0-19-958771-1 2017:978-0-444-53803-1 1933:astro.if.ufrgs.br 1833:"In Depth | Rhea" 1802:978-0-521-80840-8 1560:978-1-4020-9216-9 1233:Voyager 1 & 2 1073:§ Atmosphere 1053:organic compounds 916:radioactive decay 883:moment of inertia 706:Greek counterpart 543: 542: 523: 522: 265:Satellite of 81:December 23, 1672 16:(Redirected from 6211: 6166: 6165: 6164: 6154: 6153: 6152: 6142: 6141: 6140: 6130: 6129: 6118: 6117: 6116: 6109: 5851: 5814: 5807: 5800: 5791: 5777: 5776: 5701: 5694: 5451: 5419:Great White Spot 5380: 5373: 5366: 5357: 5148: 5127: 5115: 5101: 5087: 5070: 5058: 5051: 5032: 5018: 5004: 4969: 4955: 4941: 4936: 4914: 4909: 4897: 4890: 4876: 4862: 4845: 4828: 4818: 4809: 4795: 4711: 4705: 4699: 4632: 4625: 4618: 4609: 4527:Outlier prograde 4075: 3966:Siarnaq subgroup 3950:Paaliaq subgroup 3913: 3684: 3677: 3670: 3661: 3570: 3539: 3492: 3474: 3467: 3460: 3451: 3338: 3336: 3325: 3324: 3315: 3305: 3303: 3298: 3285: 3284: 3282: 3280: 3265: 3259: 3258: 3256: 3254: 3234: 3228: 3227: 3225: 3224: 3218:science.nasa.gov 3210: 3204: 3203: 3201: 3200: 3191:. Archived from 3178: 3172: 3171: 3145: 3123: 3117: 3116: 3114: 3113: 3104:. Archived from 3089: 3083: 3082: 3080: 3079: 3070:. Archived from 3051: 3045: 3044: 3000: 2994: 2993: 2978: 2972: 2971: 2953: 2921: 2915: 2914: 2912: 2910: 2895: 2889: 2888: 2886: 2885: 2870: 2864: 2863: 2823: 2817: 2816: 2806: 2788: 2764: 2758: 2757: 2747: 2708:Science Advances 2699: 2688: 2674: 2668: 2667: 2647: 2641: 2640: 2600: 2594: 2593: 2591: 2590: 2581:. 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Archived from 1514: 1501: 1500: 1489: 1483: 1476: 1470: 1469: 1467: 1465: 1444: 1435: 1429: 1428: 1416: 1388: 1385: 1379: 1376: 1370: 1356: 1350: 1348: 1339: 1333: 1332: 1320: 1311: 1308: 1157:is at upper left 1143: 1131: 926:Surface features 768:William Herschel 753:Saturn VIII 661:Giuseppe Campani 573: 572: 569: 568: 565: 562: 559: 556: 485: 484: 474: 472: 440: 438: 409: 407: 376: 375:0.0029 g/cm 374: 356: 352: 350: 346: 342: 339: 325: 323: 320: 304: 302: 236: 231: 215: 203: 201: 178: 177: 174: 173: 170: 167: 164: 161: 128: 127: 124: 123: 120: 117: 114: 111: 47: 40: 21: 6219: 6218: 6214: 6213: 6212: 6210: 6209: 6208: 6199:Moons of Saturn 6174: 6173: 6172: 6162: 6160: 6150: 6148: 6138: 6136: 6124: 6114: 6112: 6104: 6102: 6097: 6090: 6059: 6025: 5958: 5919: 5852: 5843: 5823: 5818: 5788: 5783: 5765: 5734: 5714:Voyager program 5697: 5690: 5678:Cassini–Huygens 5663: 5642: 5438: 5402: 5389: 5384: 5354: 5349: 5315:Irregular moons 5296: 5136: 5130: 5125: 5120: 5111: 5097: 5083: 5068: 5063: 5054: 5047: 5028: 5014: 5000: 4992:Jupiter trojans 4965: 4951: 4939: 4934: 4912: 4907: 4893: 4886: 4872: 4860: 4841: 4826: 4821: 4814: 4805: 4791: 4770: 4763: 4719: 4712: 4706: 4700: 4691: 4652: 4645: 4636: 4606: 4601: 4562:Cassini–Huygens 4557:Rings of Saturn 4548: 4529:irregular moons 4528: 4522: 4103: 4078:Phoebe subgroup 4063: 4006: 3961: 3945: 3916:Kiviuq subgroup 3901: 3816: 3810: 3782: 3761: 3723: 3700: 3693: 3691:Moons of Saturn 3688: 3658: 3653: 3623: 3607: 3602:Cassini–Huygens 3561: 3557:Sidera Lodoicea 3540: 3527: 3511: 3483: 3478: 3415:Wayback Machine 3391:Rhea's rotation 3380:Wayback Machine 3352: 3351: 3340: 3334: 3332: 3329:This audio file 3326: 3319: 3310: 3307: 3301: 3300: 3296: 3293: 3288: 3278: 3276: 3267: 3266: 3262: 3252: 3250: 3236: 3235: 3231: 3222: 3220: 3212: 3211: 3207: 3198: 3196: 3180: 3179: 3175: 3125: 3124: 3120: 3111: 3109: 3091: 3090: 3086: 3077: 3075: 3053: 3052: 3048: 3002: 3001: 2997: 2980: 2979: 2975: 2923: 2922: 2918: 2908: 2906: 2897: 2896: 2892: 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1357: 1353: 1346: 1340: 1336: 1327: 1321: 1314: 1309: 1305: 1301: 1293:Moons of Saturn 1278:Rhea in fiction 1264: 1251:Cassini–Huygens 1247:Cassini–Huygens 1228: 1203: 1197: 1165: 1158: 1144: 1135: 1132: 1096: 1003:ejecta blankets 995:surface gravity 934: 928: 872:Cassini–Huygens 832: 827: 792: 782:) suggested in 749:Saturn VII 698:Greek mythology 687: 670:Sidera Lodoicea 653: 553: 549: 532: 470: 468: 455: 441: 436: 434: 431: 419: 417:Escape velocity 405: 403: 400: 385: 383:Surface gravity 372: 370: 367: 354: 348: 344: 340: 337: 335: 321: 318: 316: 313: 300: 298: 295: 246: 229: 227: 224: 213: 199: 197: 194: 192:Semi-major axis 158: 154: 135: 108: 104: 93: 56: 35: 28: 23: 22: 15: 12: 11: 5: 6217: 6215: 6207: 6206: 6201: 6196: 6191: 6186: 6176: 6175: 6171: 6170: 6158: 6146: 6134: 6122: 6099: 6098: 6095: 6092: 6091: 6089: 6088: 6083: 6078: 6073: 6067: 6065: 6061: 6060: 6058: 6057: 6050: 6043: 6035: 6033: 6027: 6026: 6024: 6023: 6016: 6009: 6004: 5999: 5994: 5989: 5984: 5979: 5974: 5968: 5966: 5960: 5959: 5957: 5956: 5949: 5942: 5935: 5929: 5927: 5921: 5920: 5918: 5917: 5910: 5903: 5896: 5889: 5882: 5875: 5868: 5862: 5860: 5854: 5853: 5846: 5844: 5842: 5841: 5833: 5831: 5825: 5824: 5819: 5817: 5816: 5809: 5802: 5794: 5785: 5784: 5782: 5781: 5770: 5767: 5766: 5764: 5763: 5755: 5748: 5742: 5740: 5736: 5735: 5733: 5732: 5731: 5730: 5723: 5711: 5704: 5703: 5702: 5695: 5673: 5671: 5665: 5664: 5662: 5661: 5656: 5654:Delta Octantis 5650: 5648: 5644: 5643: 5641: 5640: 5639: 5638: 5628: 5627: 5626: 5616: 5615: 5614: 5609: 5604: 5594: 5587: 5582: 5575: 5568: 5567: 5566: 5561: 5549: 5548: 5547: 5542: 5530: 5523: 5518: 5513: 5508: 5501: 5496: 5491: 5486: 5481: 5476: 5471: 5466: 5461: 5456: 5448: 5446: 5440: 5439: 5437: 5436: 5431: 5426: 5421: 5416: 5410: 5408: 5404: 5403: 5401: 5400: 5394: 5391: 5390: 5385: 5383: 5382: 5375: 5368: 5360: 5351: 5350: 5348: 5347: 5342: 5337: 5332: 5327: 5322: 5317: 5312: 5307: 5301: 5298: 5297: 5295: 5294: 5291: 5286: 5281: 5276: 5271: 5266: 5261: 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3820: 3818: 3817:(with trojans) 3812: 3811: 3809: 3808: 3803: 3798: 3792: 3790: 3784: 3783: 3781: 3780: 3775: 3769: 3767: 3763: 3762: 3760: 3759: 3754: 3749: 3744: 3739: 3733: 3731: 3729:Ring shepherds 3725: 3724: 3722: 3721: 3716: 3710: 3708: 3702: 3701: 3698: 3695: 3694: 3689: 3687: 3686: 3679: 3672: 3664: 3655: 3654: 3652: 3651: 3646: 3641: 3635: 3633: 3629: 3628: 3625: 3624: 3622: 3621: 3615: 3613: 3609: 3608: 3606: 3605: 3598: 3591: 3584: 3576: 3574: 3567: 3563: 3562: 3560: 3559: 3554: 3548: 3546: 3542: 3541: 3534: 3532: 3529: 3528: 3526: 3525: 3519: 3517: 3513: 3512: 3510: 3509: 3504: 3498: 3496: 3489: 3485: 3484: 3479: 3477: 3476: 3469: 3462: 3454: 3448: 3447: 3442: 3437: 3434:Google Rhea 3D 3431: 3418: 3405: 3394: 3387: 3382: 3373:images of Rhea 3367: 3362: 3341: 3327: 3320: 3308: 3295: 3294: 3292: 3291:External links 3289: 3287: 3286: 3260: 3229: 3205: 3173: 3136:(14): L14205. 3118: 3084: 3046: 2995: 2992:on 2012-10-22. 2973: 2916: 2890: 2865: 2818: 2759: 2689: 2669: 2642: 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OUP Oxford. 2023: 2016: 1997: 1944: 1920: 1896: 1879: 1850: 1824: 1801: 1781: 1759: 1707: 1679: 1638: 1566: 1559: 1533: 1502: 1484: 1471: 1453:(6): 146–147. 1430: 1397: 1395: 1392: 1390: 1389: 1380: 1371: 1364:Galilean moons 1351: 1334: 1312: 1302: 1300: 1297: 1296: 1295: 1290: 1285: 1280: 1275: 1270: 1263: 1260: 1227: 1224: 1199:Main article: 1196: 1193: 1164: 1161: 1160: 1159: 1145: 1138: 1136: 1133: 1126: 1108:Andreas Reufer 1095: 1092: 983:impact craters 930:Main article: 927: 924: 831: 828: 826: 823: 807:tidally locked 791: 788: 751:, and then to 686: 683: 679:moon of Saturn 652: 649: 635:Voyager probes 622:, it has high- 604:tidally locked 541: 540: 537: 536: 533: 528: 525: 524: 521: 520: 517: 514: 508: 502: 501: 498: 495: 492: 481: 480: 466: 460: 459: 456: 451: 448: 447: 432: 427: 424: 423: 420: 415: 412: 411: 401: 396: 393: 392: 386: 381: 378: 377: 368: 362: 359: 358: 333: 327: 326: 314: 309: 306: 305: 296: 291: 288: 287: 284: 278: 277: 273: 272: 267: 261: 260: 257: 251: 250: 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5834: 5832: 5830: 5826: 5822: 5815: 5810: 5808: 5803: 5801: 5796: 5795: 5792: 5780: 5772: 5771: 5768: 5762: 5760: 5756: 5754: 5753: 5749: 5747: 5744: 5743: 5741: 5737: 5729: 5728: 5724: 5722: 5721: 5717: 5716: 5715: 5712: 5710: 5709: 5705: 5700: 5696: 5693: 5689: 5688: 5686: 5685: 5680: 5679: 5675: 5674: 5672: 5670: 5666: 5660: 5657: 5655: 5652: 5651: 5649: 5645: 5637: 5634: 5633: 5632: 5629: 5625: 5622: 5621: 5620: 5617: 5613: 5610: 5608: 5605: 5603: 5600: 5599: 5598: 5595: 5593: 5592: 5588: 5586: 5583: 5581: 5580: 5576: 5574: 5573: 5569: 5565: 5562: 5560: 5557: 5556: 5555: 5554: 5550: 5546: 5543: 5541: 5538: 5537: 5536: 5535: 5531: 5529: 5528: 5524: 5522: 5519: 5517: 5514: 5512: 5509: 5507: 5506: 5502: 5500: 5497: 5495: 5492: 5490: 5487: 5485: 5482: 5480: 5477: 5475: 5472: 5470: 5467: 5465: 5462: 5460: 5459:Ring moonlets 5457: 5454: 5450: 5449: 5447: 5445: 5441: 5435: 5432: 5430: 5429:Magnetosphere 5427: 5425: 5422: 5420: 5417: 5415: 5412: 5411: 5409: 5405: 5399: 5396: 5395: 5392: 5388: 5381: 5376: 5374: 5369: 5367: 5362: 5361: 5358: 5346: 5343: 5341: 5340:Regular moons 5338: 5336: 5333: 5331: 5328: 5326: 5323: 5321: 5318: 5316: 5313: 5311: 5308: 5306: 5303: 5302: 5299: 5292: 5290: 5287: 5285: 5282: 5280: 5277: 5275: 5272: 5270: 5267: 5265: 5262: 5260: 5257: 5255: 5252: 5250: 5247: 5245: 5242: 5240: 5237: 5235: 5232: 5230: 5227: 5225: 5222: 5220: 5217: 5215: 5212: 5210: 5207: 5205: 5202: 5200: 5197: 5195: 5192: 5190: 5187: 5185: 5182: 5180: 5177: 5175: 5172: 5170: 5167: 5165: 5162: 5160: 5157: 5151: 5147: 5146: 5145: 5142: 5141: 5139: 5133: 5126: 5119: 5114: 5110: 5109: 5108: 5105: 5100: 5096: 5095: 5094: 5091: 5086: 5082: 5081: 5080: 5077: 5075: 5072: 5069: 5062: 5057: 5053: 5050: 5046: 5045: 5044: 5041: 5038: 5037: 5031: 5027: 5026: 5025: 5022: 5017: 5013: 5012: 5011: 5008: 5003: 4999: 4998: 4997: 4994: 4991: 4990: 4986: 4983: 4981: 4978: 4976: 4973: 4968: 4964: 4963: 4962: 4959: 4954: 4950: 4949: 4948: 4945: 4938: 4933: 4932: 4931: 4928: 4926: 4923: 4921: 4918: 4911: 4906: 4905: 4904: 4901: 4896: 4892: 4889: 4885: 4884: 4883: 4880: 4875: 4871: 4870: 4869: 4866: 4859: 4858: 4857: 4854: 4852: 4849: 4844: 4840: 4839: 4838: 4835: 4832: 4831: 4827: 4820: 4817: 4813: 4808: 4804: 4803: 4802: 4799: 4794: 4790: 4789: 4788: 4785: 4783: 4780: 4777: 4776: 4774: 4772: 4766: 4760: 4757: 4755: 4752: 4750: 4747: 4745: 4742: 4740: 4737: 4735: 4732: 4730: 4727: 4726: 4724: 4721: 4715: 4710: 4704: 4698: 4688: 4685: 4683: 4680: 4678: 4675: 4673: 4670: 4668: 4665: 4663: 4660: 4659: 4657: 4654: 4648: 4644: 4640: 4633: 4628: 4626: 4621: 4619: 4614: 4613: 4610: 4598: 4595: 4593: 4590: 4588: 4585: 4583: 4580: 4578: 4575: 4573: 4570: 4568: 4565: 4563: 4560: 4558: 4555: 4554: 4551: 4546: 4543: 4541: 4538: 4536: 4533: 4531: 4525: 4519: 4516: 4514: 4511: 4509: 4506: 4504: 4501: 4498: 4495: 4493: 4490: 4488: 4485: 4483: 4480: 4477: 4475: 4472: 4470: 4467: 4464: 4461: 4459: 4456: 4453: 4451: 4448: 4446: 4443: 4441: 4438: 4436: 4433: 4431: 4428: 4426: 4423: 4420: 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3971: 3970: 3968: 3964: 3958: 3955: 3954: 3952: 3948: 3942: 3939: 3937: 3934: 3931: 3929: 3926: 3924: 3921: 3920: 3918: 3914: 3911: 3908: 3904: 3898: 3897: 3893: 3891: 3888: 3886: 3885: 3881: 3879: 3878: 3874: 3870: 3867: 3865: 3862: 3861: 3860: 3859: 3855: 3851: 3848: 3846: 3843: 3842: 3841: 3840: 3836: 3834: 3833: 3829: 3827: 3826: 3822: 3821: 3819: 3813: 3807: 3804: 3802: 3799: 3797: 3794: 3793: 3791: 3789: 3785: 3779: 3776: 3774: 3771: 3770: 3768: 3764: 3758: 3755: 3753: 3750: 3748: 3745: 3743: 3740: 3738: 3735: 3734: 3732: 3730: 3726: 3720: 3717: 3715: 3712: 3711: 3709: 3707: 3706:Ring moonlets 3703: 3696: 3692: 3685: 3680: 3678: 3673: 3671: 3666: 3665: 3662: 3650: 3647: 3645: 3642: 3640: 3637: 3636: 3634: 3630: 3620: 3617: 3616: 3614: 3610: 3604: 3603: 3599: 3597: 3596: 3592: 3590: 3589: 3585: 3583: 3582: 3578: 3577: 3575: 3571: 3568: 3564: 3558: 3555: 3553: 3550: 3549: 3547: 3543: 3538: 3524: 3521: 3520: 3518: 3514: 3508: 3505: 3503: 3500: 3499: 3497: 3493: 3490: 3486: 3482: 3475: 3470: 3468: 3463: 3461: 3456: 3455: 3452: 3446: 3443: 3441: 3438: 3435: 3432: 3430: 3426: 3422: 3419: 3416: 3412: 3409: 3406: 3403: 3399: 3395: 3392: 3388: 3386: 3383: 3381: 3377: 3374: 3372: 3368: 3366: 3363: 3361: 3357: 3354: 3353: 3349: 3345: 3330: 3290: 3274: 3270: 3264: 3261: 3248: 3244: 3240: 3233: 3230: 3219: 3215: 3209: 3206: 3195:on 2010-07-01 3194: 3190: 3189: 3184: 3177: 3174: 3169: 3165: 3161: 3157: 3153: 3149: 3144: 3139: 3135: 3131: 3130: 3122: 3119: 3108:on 2012-02-17 3107: 3103: 3099: 3095: 3088: 3085: 3074:on 2008-03-10 3073: 3069: 3065: 3061: 3059: 3050: 3047: 3042: 3038: 3034: 3030: 3026: 3022: 3018: 3014: 3010: 3006: 2999: 2996: 2991: 2987: 2983: 2977: 2974: 2969: 2965: 2961: 2957: 2952: 2947: 2943: 2939: 2935: 2931: 2927: 2920: 2917: 2904: 2900: 2894: 2891: 2879: 2875: 2869: 2866: 2861: 2857: 2853: 2849: 2845: 2841: 2837: 2833: 2829: 2822: 2819: 2814: 2810: 2805: 2800: 2796: 2792: 2787: 2782: 2778: 2774: 2770: 2763: 2760: 2755: 2751: 2746: 2741: 2737: 2733: 2729: 2725: 2721: 2717: 2713: 2709: 2705: 2698: 2696: 2694: 2690: 2686: 2682: 2678: 2673: 2670: 2665: 2661: 2657: 2653: 2646: 2643: 2638: 2634: 2630: 2626: 2622: 2618: 2614: 2610: 2606: 2599: 2596: 2585:on 2016-02-14 2584: 2580: 2576: 2570: 2567: 2562: 2558: 2554: 2548: 2544: 2540: 2539: 2531: 2528: 2523: 2519: 2515: 2511: 2507: 2503: 2499: 2495: 2491: 2484: 2481: 2476: 2472: 2468: 2464: 2457: 2454: 2449: 2445: 2441: 2437: 2430: 2428: 2426: 2424: 2420: 2415: 2411: 2407: 2403: 2399: 2395: 2388: 2381: 2379: 2375: 2370: 2366: 2362: 2358: 2354: 2350: 2349: 2344: 2337: 2334: 2322: 2318: 2314: 2310: 2306: 2302: 2295: 2288: 2285: 2279: 2274: 2269: 2264: 2260: 2256: 2253:(5): L05204. 2252: 2248: 2244: 2237: 2234: 2229: 2225: 2221: 2217: 2213: 2209: 2202: 2200: 2196: 2190: 2185: 2181: 2177: 2174:(2): L02202. 2173: 2169: 2168: 2163: 2156: 2154: 2150: 2145: 2141: 2136: 2135:10.1.1.7.5250 2131: 2127: 2123: 2119: 2115: 2114: 2106: 2104: 2100: 2089: 2085: 2078: 2075: 2064: 2060: 2054: 2051: 2046: 2040: 2036: 2035: 2027: 2024: 2019: 2013: 2009: 2008: 2001: 1998: 1993: 1989: 1985: 1981: 1977: 1973: 1969: 1965: 1961: 1957: 1956: 1948: 1945: 1934: 1930: 1924: 1921: 1910: 1906: 1900: 1897: 1893: 1889: 1883: 1880: 1867: 1863: 1857: 1855: 1851: 1838: 1834: 1828: 1825: 1820: 1816: 1812: 1808: 1804: 1798: 1794: 1793: 1785: 1782: 1770: 1763: 1760: 1754: 1750: 1746: 1742: 1738: 1734: 1730: 1726: 1723:(5813): 815. 1722: 1718: 1711: 1708: 1703: 1699: 1695: 1688: 1686: 1684: 1680: 1674: 1669: 1665: 1661: 1658:(2): L02202. 1657: 1653: 1649: 1642: 1639: 1634: 1630: 1626: 1622: 1618: 1614: 1609: 1604: 1600: 1596: 1592: 1588: 1587: 1582: 1575: 1573: 1571: 1567: 1562: 1556: 1552: 1548: 1544: 1537: 1534: 1529: 1525: 1524: 1519: 1513: 1511: 1509: 1507: 1503: 1498: 1494: 1488: 1485: 1481: 1475: 1472: 1460: 1456: 1452: 1448: 1441: 1434: 1431: 1426: 1422: 1415: 1413: 1411: 1409: 1407: 1405: 1403: 1399: 1393: 1384: 1381: 1375: 1372: 1369: 1365: 1361: 1355: 1352: 1344: 1338: 1335: 1331: 1325: 1319: 1317: 1313: 1307: 1304: 1298: 1294: 1291: 1289: 1286: 1284: 1283:Rings of Rhea 1281: 1279: 1276: 1274: 1271: 1269: 1266: 1265: 1261: 1259: 1256: 1252: 1248: 1244: 1243: 1237: 1235: 1234: 1225: 1223: 1221: 1217: 1213: 1208: 1202: 1201:Rings of Rhea 1194: 1192: 1190: 1186: 1182: 1178: 1174: 1170: 1162: 1156: 1153: 1149: 1142: 1137: 1130: 1125: 1123: 1121: 1120:giant impacts 1117: 1113: 1109: 1105: 1101: 1093: 1091: 1089: 1085: 1080: 1078: 1074: 1070: 1066: 1062: 1058: 1054: 1050: 1046: 1042: 1038: 1034: 1030: 1025: 1018: 1016: 1010: 1006: 1004: 1000: 996: 992: 988: 984: 980: 979: 974: 970: 966: 962: 958: 957:wispy terrain 954: 945: 941: 939: 933: 925: 923: 921: 917: 913: 909: 905: 900: 897: 893: 889: 884: 880: 879: 874: 873: 867: 865: 861: 857: 853: 845: 842:(right), the 841: 836: 829: 824: 822: 820: 816: 812: 808: 803: 801: 797: 789: 787: 785: 781: 777: 773: 769: 765: 764:John Herschel 760: 758: 754: 750: 746: 745:Saturn V 742: 741:Saturn I 738: 733: 731: 727: 723: 719: 715: 714:Saturn V 711: 707: 703: 699: 695: 692: 684: 682: 680: 676: 672: 671: 666: 662: 658: 650: 648: 646: 645: 640: 636: 632: 627: 625: 621: 615: 613: 609: 605: 601: 597: 593: 589: 585: 581: 577: 571: 547: 538: 534: 531: 526: 518: 515: 513: 509: 507: 504: 503: 499: 496: 493: 491: 487: 486: 482: 478: 467: 465: 461: 457: 454: 449: 445: 433: 430: 425: 421: 418: 413: 402: 399: 394: 391: 387: 384: 379: 369: 366: 360: 334: 332: 328: 315: 312: 307: 297: 294: 289: 285: 283: 279: 274: 271: 268: 266: 262: 258: 256: 252: 248: 245: 244:orbital speed 239: 235: 226: 223: 218: 212: 210: 206: 196: 193: 188: 185: 181: 176: 152: 150: 146: 143: 140: 137: 131: 126: 103: 101:Pronunciation 99: 95: 89: 84: 80: 76: 73: 72:G. D. Cassini 70: 68: 64: 59: 54: 53: 46: 41: 33: 19: 6168:Solar System 6052: 6045: 6038: 6018: 6011: 5951: 5944: 5937: 5912: 5905: 5898: 5891: 5884: 5877: 5870: 5836: 5758: 5750: 5725: 5718: 5706: 5682: 5676: 5619:Gallic group 5589: 5577: 5571: 5570: 5551: 5532: 5525: 5503: 5414:Dragon Storm 5345:Trojan moons 5335:Subsatellite 5193: 5149: 4874:Petit-Prince 4769:Minor-planet 4718:Dwarf planet 4643:Solar System 4508:Saturn LVIII 4085: 4084: 4025: 4024: 4016:Gallic group 3983: 3982: 3894: 3882: 3876: 3875: 3856: 3837: 3830: 3823: 3644:In mythology 3600: 3593: 3586: 3579: 3480: 3370: 3356:Rhea Profile 3277:. Retrieved 3272: 3263: 3251:. Retrieved 3247:the original 3242: 3232: 3221:. Retrieved 3217: 3208: 3197:. Retrieved 3193:the original 3186: 3176: 3133: 3127: 3121: 3110:. Retrieved 3106:the original 3097: 3087: 3076:. Retrieved 3072:the original 3063: 3057: 3049: 3008: 3004: 2998: 2990:the original 2985: 2976: 2933: 2929: 2919: 2909:November 27, 2907:. 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NASA/JPL 3223:2024-06-20 3199:2010-08-05 3188:ScienceNow 3112:2009-10-06 3078:2008-03-09 2884:2012-10-19 2779:(6): 235. 2589:2017-09-21 2561:Q126417214 2538:Satellites 2214:(2): 585. 2093:2024-06-07 2068:2024-06-07 1992:Q126417371 1938:2024-06-13 1914:2024-06-13 1872:January 7, 1843:January 7, 1819:Q126386131 1811:2002031557 1775:2011-12-17 1633:Q126389785 1394:References 1189:outgassing 1177:radiolysis 1163:Atmosphere 1148:ray system 1069:radiolysis 1061:radiolysis 1017:spacecraft 453:Axial tilt 422:0.635 km/s 357:10 Earths) 351:10 kg 282:Dimensions 149:Adjectives 6120:Astronomy 6054:Kepler-7b 6040:GJ 1132 b 5997:Enceladus 5727:Voyager 2 5720:Voyager 1 5647:Astronomy 5527:Enceladus 5407:Geography 5239:Enceladus 5113:Gǃòʼé ǃHú 5024:Eurybates 5002:Menoetius 4996:Patroclus 4985:Dinkinesh 4930:Kleopatra 4833:Main belt 4793:Dimorphos 4651:Planetary 4572:Chrysalis 4215:Bergelmir 4171:Hyrrokkin 4044:Saturn LX 3832:Enceladus 3595:Voyager 2 3588:Voyager 1 3488:Geography 3427:from the 3389:Movie of 3214:"Cassini" 3143:1008.1764 3041:206509814 2968:206530211 2860:0019-1035 2838:: 37–52. 2795:2632-3338 2736:2375-2548 2637:0094-8276 2522:1086-9379 2130:CiteSeerX 1976:0148-0227 1625:252992162 1617:0004-6256 1425:space.com 1185:oxidation 1173:exosphere 1094:Formation 1057:pyrolysis 981:. 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Index

Atmosphere of Rhea
577 Rhea

Cassini
Discovered by
G. D. Cassini
/ˈr.ə/
Ῥέᾱ
Adjectives
/ˈr.ən/
Orbital characteristics
Semi-major axis
Eccentricity
Orbital period (sidereal)
d
orbital speed
Inclination
Satellite of
Saturn
Dimensions
Mean radius
Surface area
Mass
density
Surface gravity
m/s
Moment of inertia factor
Escape velocity
Synodic rotation period
synchronous

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