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Occultation

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771:, the first such occultation detected. The multi-faceted campaign involved cooperation from the Argentinian government (including local governments – a major highway was closed for two hours, and street lights were turned off, in order to preclude light pollution), three spacecraft, 24 portable ground-based telescopes, and NASA's SOFIA airborne observatory in "the most challenging stellar occultation in the history of astronomy," in an effort spanning six months. 120: 240: 101: 329: 2059: 711: 2083: 2035: 745: 2071: 2047: 243: 247: 246: 242: 241: 248: 224: 245: 620:
along a track across the southern United States, northern Mexico, and north parts of the Caribbean. Observations from 130 different locations defined the shape of about two-thirds of the asteroid, and detected the secondary companion of the bright binary star; these observations, taken together with
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passes in front of a star, temporarily blocking its light as seen from Earth. These occultations are useful for measuring the size and position of body much more precisely than can be done by other means. A cross-sectional profile of the shape of a body can even be determined if a number of observers
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the Moon, at any given time, occults an indeterminate number of stars and galaxies. However the Moon occulting (obscuring) two bright objects (e.g. two planets or a bright star and a planet) simultaneously is extremely rare and can be seen only from a small part of the world: the last such event was
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around distant stars. The satellite consists of a large, very lightweight sheet, and a set of maneuvering thrusters and navigation systems. It would maneuver to a position along the line of sight between the telescope and a nearby star. The satellite would thereby block the radiation from the star,
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Several times during the year the Moon can be seen occulting a planet. Since planets, unlike stars, have significant angular sizes, lunar occultations of planets will create a narrow zone on Earth from which a partial occultation of the planet will occur. An observer located within that narrow zone
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In rare cases, one planet can pass in front of another. If the nearer planet appears larger than the more distant one, the event is called a mutual planetary occultation. The last occultation or transit occurred on 3 January 1818 and the next will occur on 22 November 2065, in both cases involving
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of those stars. Early radio astronomers found occultations of radio sources by the Moon valuable for determining their exact positions, because the long wavelength of radio waves limited the resolution available through direct observation. This was crucial for the unambiguous identification of the
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or 0.28 ÎĽrad, a star that is occulted by the Moon will disappear or reappear in 0.1 seconds or less on the Moon's edge, or limb. Events that take place on the Moon's dark limb are of particular interest to observers, because the lack of glare allows easier observation and timing.
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Within a few kilometres of the edge of an occultation's predicted path, referred to as its northern or southern limit, an observer may see the star intermittently disappearing and reappearing as the irregular limb of the Moon moves past the star, creating what is known as a
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The accurate timing of lunar occultations is performed regularly by (primarily amateur) astronomers. Lunar occultations timed to an accuracy of a few tenths of a second have various scientific uses, particularly in refining our knowledge of
414:. This is one of the rarest events known, with the next occurrence on February 10, 7541. This event is visible worldwide since the duo would be positioned almost in opposition to the sun, in the border line between the constellations of 1475:"New Mysteries Surround New Horizons' Next Flyby Target: NASA's New Horizons spacecraft doesn't zoom past its next science target until New Year's Day 2019, but the Kuiper Belt object, known as 2014 MU69, is already revealing surprises" 70:, but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background. In this general sense, occultation applies to the visual scene observed from low-flying aircraft (or 136: 756:
placed an upper limit on Eris's diameter of 2320 km, making it almost the same size as Pluto. Due to their slower movement through the night sky, occultations by TNOs are far less common than by asteroids in the
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during an occultation of a faint star in April 2011. Note: the actual shape of the shadow on Earth will not be exactly round as shown here. This video is to illustrate the phenomenon.
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engine in combination with using the sheet as a light sail. Positioned at a distance of 100,000 km from the telescope, it would block more than 99.998% of the starlight.
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those of a separate occultation by Pallas in 1979, provided a complete figure for the asteroid eight years before any asteroid was visited by a spacecraft (the much smaller
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could observe the planet's disk partly blocked by the slowly moving Moon. The same mechanism can be seen with the Sun, where observers on Earth will view it as a
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The proposed satellite would have a dimension of 70 by 70 metres (230 ft Ă— 230 ft), a mass of about 600 kg, and maneuver by means of an
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in the early morning of 20 March 2014. This was the brightest occultation of an asteroid ever predicted to occur over a populated area. As the
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Ortiz, J.L.; (91 more authors) (12 October 2017). "The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation".
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are in this epoch only possible by the Moon, because the planets pass Aldebaran to the north. Neither planetary nor lunar occultations of
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is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in
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Hazard, C.; Mackey, M. B.; Shimmins, A. J. (1963). "Investigation of the Radio Source 3C273 by the method of Lunar Occultations".
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of the orbit, the satellite would remain relatively stationary with respect to the ground, allowing longer exposure times.
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at different, nearby, locations observe the occultation. Occultations have been used to calculate the diameter of
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are currently possible, however several thousand years ago lunar occultations were possible. Some notably close
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between –6.6 and +6.6 degrees may be occulted by it. Three first magnitude stars appear well within that band –
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Jupiter (the bright object in the upper right) a few minutes before being occulted by the Moon on 16 June 2005.
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disc. A comparable proposal was also made for a satellite to occult bright X-ray sources, called an
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Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes
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was observed by over 38 observatories in one occultation on 3 March 1998, which resulted in many
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The Moon or another celestial body can occult multiple celestial bodies at the same time.
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occulted stars in 1988, 2002, and 2006, allowing its tenuous atmosphere to be studied via
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of small bodies and detecting a second, superimposed brightness variation, from which an
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Stars may also be occulted by planets. Occultations of bright stars are rare. In 1959,
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Copi, C. J.; Starkman, G. D. (2000). "The Big Occulting Steerable Satellite (BOSS)".
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There are two possible configurations of this satellite. The first would work with a
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If the closer body does not entirely conceal the farther one, the event is called a
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for the satellite (secondary), and a secondary-to-primary diameter-ratio (for the
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during the course of its orbital motion around the Earth. Since the Moon, with an
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were first discovered when that planet occulted a star in 1977. On 3 July 1989,
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Occlusion of an object by another object that passes between it and the observer
1341:"Volunteer observers invited to time the March 20, 2014 Occultation of Regulus" 1971: 1917: 641: 622: 575: 562: 320:. Therefore, a total solar eclipse is essentially the Moon occulting the Sun. 1318: 694:
passed in front of the star its 100 km (60 mi) shadow swept across
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According to the 1998 European Asteroidal Occultation Results from Euraster,
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was observed in a stellar transit on 21 January 2017, identifying a ring.
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Preliminary results of a 6 November 2010 occultation by the dwarf planet
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on 23 April 1998 when it occulted Venus and Jupiter for observers on
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In this July 1997 still frame captured from video, the bright star
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This animation shows the path of the shadow of the dwarf planet
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Occultation of the planet Saturn by the Moon on 3 November 2001.
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Scientists Use Novel Technique To Watch Occultations By Planets
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On 3 June 2017, a star was occulted by the Kuiper belt object
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Albers, Steven, "Mutual Occultations of Planets: 1557–2230",
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Discovery Hints at a Quadrillion Space Rocks Beyond Neptune
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Occultations of bright stars by planets between 0 and 4000
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The Moon's orbit is inclined slightly with respect to the
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The International Occultation Timing Association (IOTA).
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The term occultation is most frequently used to describe
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Planetary Conjunctions and Mutual Planetary Occultations
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Meeus, Jean (1971). "La périodicité des occultations".
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International Occultation Timing Association (IOTA)
878:(also for occultations of planets by other planets) 698:and Suffolk counties, all of New York City and the 54:has just reappeared on the dark limb of the waning 1661:Mutual occultations (and conjunctions) of planets 1607:Astronomical Tables of the Sun, Moon and Planets 1576:"The X-ray Occulting Steerable Satellite (XOSS)" 849:An updated version of this design is called the 817:permitting the orbiting planets to be observed. 94:The symbol for an occultation, and especially a 1153:. MIT Planetary Astronomy Lab. 20 December 2007 942:TAOS: The Taiwanese-American Occultation Survey 482:have been discovered analyzing the photometric 152:, those relatively frequent occasions when the 1252:"1998 European Asteroidal Occultation Results" 992:Meeus, Jean (1997). "Series of occultations". 1762: 8: 1172:Dunham, David W.; (45 more authors) (1990). 996:. Richmond: Willmann-Bell. pp. 113–124. 1735:, (software), Durch Occultation Association 1459:: CS1 maint: numeric names: authors list ( 1281: 1279: 1214:: CS1 maint: numeric names: authors list ( 308:'s discovery of the cosmological nature of 300:with the optical quasar and its jet, and a 1790: 1769: 1755: 1747: 1609:. Richmond, Virginia: Willmann-Bell, Inc. 380:passed in front of the 5th magnitude star 1535: 1428: 1402: 1199: 1005: 1003: 1741:, (software), www.lunar-occultations.com 802:Big Occulting Steerable Satellite (BOSS) 327: 222: 134: 45: 2030: 1640:Occultation Studies at Williams College 964: 706:. Bad weather obscured the occultation. 472:mutual occultation and eclipsing events 1452: 1207: 808:that would work in conjunction with a 1509:New Horizons: NASA's Mission to Pluto 7: 1655:Moon, planets, asteroid occultations 917:Occultations, transits, and eclipses 907:List of Solar System objects by size 474:can occur between a primary and its 258:Total Solar Eclipse on April 8, 2024 1705:, www.asteroidoccultation.com, 2018 922:Planetary transits and occultations 863:X-ray Occulting Steerable Satellite 356:Planetary transits and occultations 831:, most likely positioned near the 503:Notable occultations of asteroids 164:with respect to the stars of 0.55 144:Occultation of a star by the Moon. 25: 632:On 12 March 2009 nine asteroids ( 38:For the Shia Islamic belief, see 2081: 2069: 2057: 2045: 2033: 783:Because of its relatively large 99: 220:, can be occulted by the Moon. 1642:, www.stellaroccultations.info 1231:"Asteroid Occultation Updates" 994:Mathematical Astronomy Morsels 612:occulted the naked-eye bright 426:Occultations by smaller bodies 1: 1481:. 5 July 2017. Archived from 1135:Bob King (20 December 2020). 686:was occulted by the asteroid 466:http://www.occultwatcher.net/ 1703:Asteroid Occultation Updates 1682:, www.space.com, August 2006 58:in this predawn occultation. 1733:Lunar Occultation Workbench 1725:Il cielo ed i suoi femomeni 188:) meaning any star with an 2130: 1368:"The shadowy hand of Eris" 990:– English translation in: 912:Lunar occultation of Venus 353: 111: 72:computer-generated imagery 29: 1793: 1778:Small Solar System bodies 1524:The Astrophysical Journal 1313:Vitagliano, Aldo (2010). 892:Grazing lunar occultation 390:atmospheric limb sounding 332:A grazing occultation of 276:grazing lunar occultation 494:) can often be derived. 431: 112:Not to be confused with 108:Occultations by the Moon 31:Not to be confused with 2104:Observational astronomy 1691:31 October 2018 at the 796:Artificial occultations 445:trans-Neptunian objects 436:small Solar System body 1903:Trans-Neptunian object 1711:, www.occultations.net 1709:Occultations by Phoebe 1657:, www.occultations.net 1578:. CASE. Archived from 1370:. Mike Brown's Planets 1286:Dunham, David (2006). 1151:"Stellar Occultations" 1139:. Sky & Telescope. 727: 351: 324:Occultation by planets 293:effective temperatures 269: 236: 228: 145: 132: 59: 902:List of minor planets 721: 480:large number of moons 396:the same two planets— 331: 251: 234: 226: 156:passes in front of a 143: 122: 49: 1876:Distant minor planet 1670:, TAU astronomy Club 1666:11 July 2011 at the 1605:Meeus, Jean (1995). 1366:Brown, Mike (2010). 1321:on 18 September 2015 1270:23 July 2011 at the 1179:Astronomical Journal 876:Astronomical transit 614:spectroscopic binary 2114:Stellar occultation 2109:Astronomical events 1546:2000ApJ...532..581C 1421:10.1038/nature24051 1413:2017Natur.550..219O 1192:1990AJ.....99.1636D 1045:1963Natur.197.1037H 986:1972LAstr..86..141M 897:Grazing occultation 776:Double occultations 700:Hudson River Valley 658:2448 Sholokhov 504: 131:on 8 November 2022. 40:Occultation (Islam) 1650:lunar occultations 947:Transit of Mercury 937:Syzygy (astronomy) 728: 704:North Bay, Ontario 692:main belt asteroid 654:980 Anacostia 502: 352: 270: 237: 229: 150:lunar occultations 146: 133: 60: 2021: 2020: 1933: 1932: 1818:Meanings of names 1697:The Starry Mirror 1397:(7675): 219–223. 1347:on 27 August 2017 1116:on 13 August 2012 1097:Sky and Telescope 1053:10.1038/1971037a0 927:Radio occultation 760:The dwarf planet 719: 679:being determined. 662:1746 Brouwer 646:201 Penelope 629:in October 1991). 600: 599: 434:are those when a 430:A further set of 304:prerequisite for 249: 190:ecliptic latitude 186:orbit of the Moon 172:of at most 0.057 141: 16:(Redirected from 2121: 2086: 2085: 2084: 2074: 2073: 2072: 2062: 2061: 2060: 2050: 2049: 2038: 2037: 2036: 2029: 1791: 1771: 1764: 1757: 1748: 1729: 1625: 1620: 1592: 1591: 1589: 1587: 1572: 1566: 1565: 1539: 1537:astro-ph/9904413 1519: 1513: 1512: 1501: 1495: 1494: 1492: 1490: 1471: 1465: 1464: 1458: 1450: 1432: 1406: 1386: 1380: 1379: 1377: 1375: 1363: 1357: 1356: 1354: 1352: 1343:. 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539: 533: 532: 529: 526: 524:704 Interamnia 520: 519: 514: 509: 499: 496: 488:orbital period 451: 427: 424: 354:Main article: 325: 322: 216:, such as the 109: 106: 104:(U+1F775 đźťµ). 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2126: 2115: 2112: 2110: 2107: 2105: 2102: 2101: 2099: 2089: 2079: 2077: 2067: 2065: 2055: 2053: 2048: 2043: 2041: 2031: 2027: 2014: 2011: 2009: 2006: 2004: 2001: 2000: 1998: 1994: 1988: 1985: 1983: 1980: 1978: 1975: 1973: 1970: 1968: 1965: 1963: 1960: 1958: 1955: 1953: 1950: 1948: 1945: 1944: 1942: 1940: 1936: 1924: 1921: 1919: 1916: 1914: 1911: 1909: 1906: 1905: 1904: 1901: 1899: 1896: 1892: 1889: 1887: 1884: 1883: 1882: 1881: 1879: 1877: 1873: 1867: 1864: 1862: 1859: 1857: 1854: 1852: 1849: 1847: 1846:Asteroid belt 1844: 1842: 1841:Aten asteroid 1839: 1837: 1834: 1833: 1831: 1829: 1825: 1819: 1816: 1814: 1811: 1809: 1806: 1804: 1801: 1799: 1796: 1795: 1792: 1789: 1787: 1786:Minor planets 1783: 1779: 1772: 1767: 1765: 1760: 1758: 1753: 1752: 1749: 1745: 1740: 1737: 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958: 953: 950: 948: 945: 943: 940: 938: 935: 933: 932:Solar eclipse 930: 928: 925: 923: 920: 918: 915: 913: 910: 908: 905: 903: 900: 898: 895: 893: 890: 888: 885: 883: 880: 877: 874: 873: 868: 866: 864: 860: 856: 852: 847: 845: 841: 834: 830: 825: 823: 818: 815: 811: 807: 803: 795: 793: 791: 786: 781: 775: 770: 766: 763: 759: 755: 751: 750:constellation 747: 743: 739: 735: 734: 730: 725: 705: 701: 697: 693: 689: 685: 681: 678: 674: 670: 667: 663: 659: 655: 651: 647: 643: 639: 635: 631: 628: 624: 619: 615: 611: 607: 606: 602: 595: 592: 590: 587: 586: 582: 579: 577: 574: 573: 569: 566: 564: 561: 560: 556: 553: 551: 548: 547: 543: 540: 538: 535: 534: 530: 527: 525: 522: 521: 518:profile (km) 515: 513: 510: 507: 506: 497: 495: 493: 492:binary system 489: 485: 481: 477: 473: 470:In addition, 468: 467: 463: 459: 454: 446: 441: 437: 433: 425: 423: 421: 417: 413: 409: 405: 403: 399: 393: 391: 387: 383: 382:28 Sagittarii 379: 375: 371: 367: 363: 357: 349: 348: 343: 339: 335: 330: 323: 321: 319: 318:solar eclipse 313: 311: 307: 303: 299: 296:radio source 294: 290: 286: 280: 278: 277: 267: 263: 259: 256:Video of the 255: 233: 225: 221: 219: 215: 211: 207: 203: 199: 195: 191: 187: 183: 178: 175: 171: 167: 163: 162:angular speed 159: 155: 151: 130: 129:lunar eclipse 126: 121: 115: 114:Lunar eclipse 107: 105: 102: 97: 96:solar eclipse 92: 90: 86: 82: 81: 75: 73: 69: 65: 57: 56:crescent moon 53: 48: 41: 34: 19: 2088:Solar System 2013:Space debris 1744: 1728:(in Italian) 1724: 1696: 1606: 1584:. Retrieved 1580:the original 1570: 1527: 1523: 1517: 1508: 1499: 1487:. Retrieved 1483:the original 1478: 1469: 1455:cite journal 1394: 1390: 1384: 1372:. Retrieved 1361: 1349:. Retrieved 1345:the original 1335: 1323:. Retrieved 1319:the original 1308: 1296:. Retrieved 1292:the original 1256:. Retrieved 1246: 1234:. Retrieved 1224: 1210:cite journal 1183: 1177: 1167: 1155:. Retrieved 1145: 1130: 1118:. Retrieved 1114:the original 1104: 1099:, March 1979 1096: 1091: 1079:. Retrieved 1069: 1036: 1032: 1026: 1014:. Retrieved 993: 977: 973: 967: 862: 848: 826: 819: 801: 799: 782: 779: 618:1 Vulpeculae 484:light curves 471: 469: 440:dwarf planet 432:occultations 429: 406: 394: 359: 345: 344:, imaged by 314: 281: 274: 271: 179: 149: 147: 93: 84: 78: 76: 63: 61: 18:Occultations 2076:Outer space 2064:Spaceflight 2003:Cosmic dust 1967:Long-period 1957:Halley-type 1913:Kuiper belt 1798:Designation 1624:(in German) 1430:10045/70230 1325:13 February 1298:13 February 1236:25 February 1186:(5): 1636. 1081:10 November 980:: 240–252. 882:Conjunction 859:coronagraph 537:39 Laetitia 302:fundamental 252:Ten Minute 127:during the 64:occultation 2098:Categories 2008:Meteoroids 1987:Sungrazing 1962:Hyperbolic 1918:Oort cloud 1861:Near-Earth 1586:9 February 1404:2006.03113 1374:7 November 1258:1 December 1157:26 October 959:References 812:to detect 757:main-belt. 634:85 Io 576:444 Gyptis 563:375 Ursula 254:Time Lapse 174:arcseconds 2040:Astronomy 1898:Damocloid 1447:205260767 1351:3 October 865:or XOSS. 855:sunflower 851:Starshade 822:ion drive 810:telescope 806:satellite 742:magnitude 682:The star 603:Asteroids 550:94 Aurora 476:satellite 364:occulted 206:Aldebaran 85:occlusion 68:astronomy 52:Aldebaran 1982:Periodic 1908:Detached 1828:Asteroid 1689:Archived 1664:Archived 1562:18790887 1439:29022593 1268:Archived 1265:(Chords) 1120:9 August 869:See also 857:-shaped 724:Makemake 610:2 Pallas 596:278Ă—142 589:48 Doris 583:179Ă—150 557:225Ă—173 544:219Ă—142 531:350Ă—304 516:Measured 498:Examples 447:such as 289:binaries 262:Mazatlán 218:Pleiades 182:ecliptic 2026:Portals 1947:Extinct 1886:Centaur 1648:, with 1542:Bibcode 1489:20 July 1409:Bibcode 1188:Bibcode 1061:4270661 1041:Bibcode 1016:16 June 982:Bibcode 814:planets 748:in the 684:Regulus 627:Galileo 570:216±10 450:2002 TX 408:Jupiter 402:Jupiter 366:Regulus 310:quasars 202:Antares 194:Regulus 89:eclipse 80:transit 1939:Comets 1851:Family 1836:Active 1803:Groups 1739:Occult 1699:, 2007 1613:  1560:  1445:  1437:  1391:Nature 1059:  1033:Nature 844:apogee 762:Haumea 696:Nassau 677:chords 664:, and 623:Gaspra 512:Chords 462:Varuna 420:Taurus 412:Saturn 378:Saturn 370:Uranus 340:, two 298:3C 273 266:Mexico 210:Pollux 200:, and 166:arcsec 125:Uranus 33:Occult 2052:Stars 1996:Other 1952:Great 1558:S2CID 1532:arXiv 1443:S2CID 1399:arXiv 1057:S2CID 833:Earth 754:Cetus 740:of a 616:star 458:Ixion 416:Orion 398:Venus 386:Pluto 374:rings 362:Venus 338:Dione 260:, in 198:Spica 184:(see 98:, is 1972:Lost 1813:Moon 1808:List 1611:ISBN 1588:2007 1491:2017 1479:NASA 1461:link 1435:PMID 1376:2010 1353:2014 1327:2011 1300:2011 1260:2008 1238:2009 1216:link 1159:2009 1122:2012 1083:2021 1018:2005 835:'s L 800:The 746:star 738:Eris 508:Name 478:. A 460:and 418:and 400:and 334:Rhea 158:star 154:Moon 1550:doi 1528:532 1425:hdl 1417:doi 1395:550 1196:doi 1049:doi 1037:197 752:of 744:17 625:by 541:~16 452:300 438:or 372:'s 336:by 62:An 2100:: 1723:, 1695:, 1556:. 1548:. 1540:. 1526:. 1507:. 1477:. 1457:}} 1453:{{ 1441:. 1433:. 1423:. 1415:. 1407:. 1393:. 1278:^ 1212:}} 1208:{{ 1194:. 1184:99 1182:. 1176:. 1055:. 1047:. 1035:. 1002:^ 978:87 976:. 792:. 660:, 656:, 652:, 648:, 644:, 640:, 636:, 528:35 456:, 404:. 392:. 384:. 312:. 264:, 196:, 91:. 2028:: 1770:e 1763:t 1756:v 1619:. 1590:. 1564:. 1552:: 1544:: 1534:: 1493:. 1463:) 1449:. 1427:: 1419:: 1411:: 1401:: 1378:. 1355:. 1329:. 1302:. 1262:. 1240:. 1218:) 1204:. 1198:: 1190:: 1161:. 1124:. 1085:. 1063:. 1051:: 1043:: 1020:. 988:. 984:: 837:2 593:4 580:6 567:6 554:9 350:. 268:. 116:. 42:. 35:. 20:)

Index

Occultations
Occult
Occultation (Islam)

Aldebaran
crescent moon
astronomy
computer-generated imagery
transit
eclipse
solar eclipse
đźťµ
Lunar eclipse

Uranus
lunar eclipse
Moon
star
angular speed
arcsec
angular diameter
arcseconds
ecliptic
orbit of the Moon
ecliptic latitude
Regulus
Spica
Antares
Aldebaran
Pollux

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