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Barycenter (astronomy)

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2548: 1418: 2620: 163: 1757: 2584: 2608: 2560: 2596: 2572: 1547: 649:, whose barycenter is located on average 4,671 km (2,902 mi) from Earth's center, which is 74% of Earth's radius of 6,378 km (3,963 mi). When the two bodies are of similar masses, the barycenter will generally be located between them and both bodies will orbit around it. This is the case for 129: 108: 89: 68: 52: 1813:
To calculate the actual motion of the Sun, only the motions of the four giant planets (Jupiter, Saturn, Uranus, Neptune) need to be considered. The contributions of all other planets, dwarf planets, etc. are negligible. If the four giant planets were on a straight line on the same side of the Sun,
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If one of the two orbiting bodies is much more massive than the other and the bodies are relatively close to one another, the barycenter will typically be located within the more massive object. In this case, rather than the two bodies appearing to orbit a point between them, the less massive body
1956:(Einsteinian gravitation), complications arise because, while it is possible, within reasonable approximations, to define the barycenter, we find that the associated coordinate system does not fully reflect the inequality of clock rates at different locations. 1752:{\displaystyle {a \over R_{\odot }}\cdot {m_{\mathrm {planet} } \over m_{\odot }}>1\;\Rightarrow \;{a\cdot m_{\mathrm {planet} }}>{R_{\odot }\cdot m_{\odot }}\approx 2.3\times 10^{11}\;m_{\oplus }\;{\mbox{km}}\approx 1530\;m_{\oplus }\;{\mbox{AU}}} 847: 2481:
Kaib, Nathan A.; Becker, Andrew C.; Jones, R. Lynne; Puckett, Andrew W.; Bizyaev, Dmitry; Dilday, Benjamin; Frieman, Joshua A.; Oravetz, Daniel J.; Pan, Kaike; Quinn, Thomas; Schneider, Donald P.; Watters, Shannon (2009). "2006
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or move at various velocities, so the world-time must be synchronized with some ideal clock that is assumed to be very far from the whole self-gravitating system. This time standard is called
735: 950:. The terms "primary" and "secondary" are used to distinguish between involved participants, with the larger being the primary and the smaller being the secondary. 677:; despite the Sun being a thousandfold more massive than Jupiter, their barycenter is slightly outside the Sun due to the relatively large distance between them. 2155:
For objects at such high eccentricity, barycentric coordinates are more stable than heliocentric coordinates for a given epoch because the barycentric
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will appear to orbit about the more massive body, while the more massive body might be observed to wobble slightly. This is the case for the
2454: 1773:'s orbit (57,900,000 km, 0.387 AU), the Sun–Jupiter barycenter would be approximately 55,000 km from the center of the Sun ( 1079: 1055: 2249: 330: 399: 1477: 2434: 2407: 669:. When the less massive object is far away, the barycenter can be located outside the more massive object. This is the case for 2376: 220: 1810:
10 km, 68 AU), the Sun–Earth barycenter would still be within the Sun (just over 30,000 km from the center).
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the combined center of mass would lie at about 1.17 solar radii, or just over 810,000 km, above the Sun's surface.
2277: 1972: 551: 484: 1967:. Individual clocks of similar construction will not agree with this standard, because they are subject to differing 2655: 2169: 2488: 2221: 1383: 1836:. Hence, the position of the barycenter varies too, and it is possible in some systems for the barycenter to be 479: 394: 591: 2226: 1989: 1968: 350: 584: 544: 267: 452: 287: 195: 2302:"Evidence that Pluto's atmosphere does not collapse from occultations including the 2013 May 04 event" 1952:(Newtonian gravitation), this definition simplifies calculations and introduces no known problems. In 2507: 2351: 2313: 1829: 325: 282: 272: 200: 135: 33: 934:
the more massive body, that body will appear to "wobble" rather than to follow a discernible orbit.
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The coordinate systems involve a world-time, i.e. a global time coordinate that could be set up by
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The calculations above are based on the mean distance between the bodies and yield the mean value
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Barycentric osculating orbital elements for some objects in the Solar System are as follows:
722:. In a simple two-body case, the distance from the center of the primary to the barycenter, 2564: 2515: 2331: 2321: 2241: 2156: 2053: 1770: 707: 701: 638: 525: 474: 239: 183: 2037: 1994: 1957: 897: 684:
are non-rotating coordinates with the origin at the barycenter of two or more bodies. The
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point, not a physical object. It is an important concept in fields such as astronomy and
2511: 2317: 1417: 2624: 2552: 2184: 2179: 2012: 711: 622: 502: 418: 412: 335: 260: 254: 249: 2519: 2650: 2634: 2301: 2242: 1199: 654: 637:. The distance from a body's center of mass to the barycenter can be calculated as a 507: 340: 297: 78: 2527: 2372: 162: 2619: 2576: 1422: 943: 719: 689: 646: 634: 225: 215: 210: 2326: 1541:
Hence, the barycenter of the Sun–planet system will lie outside the Sun only if:
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one another and is the point about which the bodies orbit. A barycenter is a
2021: 1964: 1106: 715: 572: 995:(km) is the average orbital distance between the centers of the two bodies 2005: 863: 2336: 2244:
Newton's Gravity: An Introductory Guide to the Mechanics of the Universe
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is not as greatly affected by where Jupiter is on its 11.8 year orbit.
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Olkin, C. B.; Young, L. A.; Borncamp, D.; et al. (January 2015).
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explains how to set up barycentric coordinates in general relativity.
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a value less than one means the barycenter lies inside the primary
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The Sol-Jupiter barycenter sits 1.07 times the radius of the sun
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of each body. This is an important concept in the fields of
688:(ICRS) is a barycentric coordinate system centered on the 32:"Barycenter" redirects here. For the general concept, see 2486:: A Likely Long-Period Comet from the Inner Oort Cloud". 1445:—which is true for the Sun and any planet—then the ratio 1386:
because their barycenter does not lie within either body.
2455:"Barycentric Osculating Orbital Elements for 2007 TG422" 113:
Two bodies with an extreme difference in mass, like the
2402:, Richmond, Virginia: Willmann-Bell, pp. 165–168, 94:
Two bodies with significant difference in masses, like
2352:"If You Think Jupiter Orbits the Sun, You're Mistaken" 1743: 1718: 2536: 1849: 1550: 1480: 872:
is the distance between the centers of the two bodies
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Center of mass of multiple bodies orbiting each other
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The following table sets out some examples from the
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The Sun orbits a barycenter just above its surface.
1918: 1751: 1530: 841: 2286:barycentre lies 1700 km below the Earth's surface 73:Two bodies with slightly different masses, like 1366:The Earth has a perceptible "wobble". Also see 2471:(Select Ephemeris Type:Elements and Center:@0) 980:is the mass of the secondary in Earth masses ( 552: 8: 1936: = 0.0484, just fails to qualify: 962:is the mass of the primary in Earth masses ( 2427:Essential Relativistic Celestial Mechanics 1840:the more massive body. This occurs where: 1741: 1730: 1716: 1705: 1622: 1618: 559: 545: 147: 2501: 2335: 2325: 1898: 1887: 1877: 1871: 1850: 1848: 1742: 1735: 1717: 1710: 1699: 1679: 1666: 1661: 1635: 1634: 1623: 1604: 1578: 1577: 1571: 1560: 1551: 1549: 1517: 1507: 1501: 1490: 1481: 1479: 828: 818: 812: 800: 788: 775: 764: 758: 743: 737: 2375:. Space Place @ NASA. 8 September 2005. 2175:Centers of gravity in non-uniform fields 1985: 1045: 686:International Celestial Reference System 2543: 2240:MacDougal, Douglas W. (December 2012). 2211: 1395:The Sun's wobble is barely perceptible. 1359: 450: 365: 169: 155: 57:Two bodies with similar mass, like the 1838:sometimes inside and sometimes outside 1762:—that is, where the planet is massive 1382:and Charon are sometimes considered a 866:from body 1's center to the barycenter 2379:from the original on 23 December 2010 2250:Springer Science & Business Media 1979:Selected barycentric orbital elements 946:. Figures are given rounded to three 7: 134:Two bodies with the same mass with 18:Barycentric coordinates (astronomy) 1651: 1648: 1645: 1642: 1639: 1636: 1594: 1591: 1588: 1585: 1582: 1579: 25: 2278:"Center of Gravity - an overview" 1425:'s barycenter relative to the Sun 1013:(km) is the radius of the primary 331:Kepler's laws of planetary motion 2618: 2606: 2594: 2582: 2570: 2558: 2546: 161: 127: 106: 87: 66: 50: 2641:Astronomical coordinate systems 930:When the barycenter is located 2400:Mathematical Astronomy Morsels 1619: 1: 1929:The Sun–Jupiter system, with 1802:). But even if the Earth had 706:The barycenter is one of the 2327:10.1016/j.icarus.2014.03.026 138:elliptic orbits, common for 2520:10.1088/0004-637X/695/1/268 1973:Barycentric Coordinate Time 625:of two or more bodies that 485:Tsiolkovsky rocket equation 2672: 2453:output (30 January 2011). 2170:Barycentric Dynamical Time 2130: 2114: 2091: 2068: 2052: 2036: 2020: 1048:Primary–secondary examples 938:Primary–secondary examples 900:of the secondary's orbit, 699: 607: 604: 'heavy' and 590: 454:Engineering and efficiency 273:Bi-elliptic transfer orbit 31: 2489:The Astrophysical Journal 2222:Oxford English Dictionary 1938:1.05 < 1.07 > 0.954 1969:gravitational potentials 1944:Relativistic corrections 480:Propellant mass fraction 379:Gravitational influences 44:Animation of barycenters 2429:. London: Adam Hilger. 2227:Oxford University Press 682:barycentric coordinates 621: 'center') is the 351:Specific orbital energy 2373:"What's a Barycenter?" 1920: 1753: 1532: 1426: 843: 661:, as well as for many 268:Hohmann transfer orbit 2038:C/1996 B2 (Hyakutake) 1921: 1754: 1533: 1420: 844: 464:Preflight engineering 196:Argument of periapsis 2398:Meeus, Jean (1997), 2282:ScienceDirect Topics 2022:C/2006 P1 (McNaught) 1847: 1548: 1478: 1413:Example with the Sun 736: 520:Propulsive maneuvers 34:Barycenter (physics) 2646:Celestial mechanics 2512:2009ApJ...695..268K 2423:Brumberg, Victor A. 2318:2015Icar..246..220O 2200:Weight distribution 2190:Mass point geometry 1950:classical mechanics 1828:, depending on the 1051: 948:significant figures 497:Efficiency measures 400:Sphere of influence 369:Celestial mechanics 151:Part of a series on 1954:general relativity 1916: 1766:far from the Sun. 1749: 1747: 1722: 1528: 1427: 1046: 892:of the two bodies. 839: 659:natural satellites 316:Dynamical friction 2656:Geometric centers 2358:. 9 August 2016. 2263:978-1-4614-5444-1 2153: 2152: 1914: 1893: 1866: 1746: 1721: 1610: 1566: 1523: 1496: 1471:approximates to: 1356: 1355: 837: 834: 795: 657:, one of Pluto's 647:Earth–Moon system 569: 568: 419:Lagrangian points 356:Vis-viva equation 326:Kepler's equation 173:Orbital mechanics 16:(Redirected from 2663: 2623: 2622: 2611: 2610: 2609: 2599: 2598: 2597: 2587: 2586: 2585: 2575: 2574: 2563: 2562: 2561: 2551: 2550: 2542: 2532: 2531: 2505: 2478: 2472: 2470: 2468: 2466: 2461:on 28 March 2014 2457:. Archived from 2447: 2441: 2440: 2419: 2413: 2412: 2395: 2389: 2388: 2386: 2384: 2369: 2363: 2362: 2348: 2342: 2341: 2339: 2329: 2297: 2291: 2290: 2274: 2268: 2267: 2247: 2237: 2231: 2230: 2225:(2nd ed.). 2216: 2157:osculating orbit 2140: 2138: 2137: 2101: 2099: 2098: 2078: 2076: 2075: 2071:(308933) 2006 SQ 2054:C/2006 M4 (SWAN) 1986: 1939: 1925: 1923: 1922: 1917: 1915: 1913: 1899: 1894: 1892: 1891: 1882: 1881: 1872: 1867: 1865: 1851: 1809: 1801: 1799: 1797: 1796: 1788: 1785: 1758: 1756: 1755: 1750: 1748: 1744: 1740: 1739: 1723: 1719: 1715: 1714: 1704: 1703: 1685: 1684: 1683: 1671: 1670: 1657: 1656: 1655: 1654: 1611: 1609: 1608: 1599: 1598: 1597: 1572: 1567: 1565: 1564: 1552: 1537: 1535: 1534: 1529: 1524: 1522: 1521: 1512: 1511: 1502: 1497: 1495: 1494: 1482: 1470: 1468: 1467: 1459: 1456: 1444: 1405: 1402: 1396: 1393: 1387: 1377: 1371: 1364: 1342: 1308: 1299: 1259: 1218: 1156: 1154: 1153: 1145: 1142: 1052: 1040: 1038: 1037: 1029: 1026: 926: 848: 846: 845: 840: 838: 836: 835: 833: 832: 823: 822: 813: 801: 796: 794: 793: 792: 780: 779: 769: 768: 759: 748: 747: 712:elliptical orbit 702:Two-body problem 696:Two-body problem 663:binary asteroids 639:two-body problem 618: 611: 601: 594: 561: 554: 547: 526:Orbital maneuver 475:Payload fraction 455: 436:Lissajous orbits 370: 341:Orbital velocity 288:Hyperbolic orbit 184:Orbital elements 174: 165: 148: 131: 110: 91: 70: 54: 21: 2671: 2670: 2666: 2665: 2664: 2662: 2661: 2660: 2631: 2630: 2629: 2617: 2607: 2605: 2595: 2593: 2583: 2581: 2569: 2559: 2557: 2545: 2537: 2535: 2485: 2480: 2479: 2475: 2464: 2462: 2449: 2448: 2444: 2437: 2421: 2420: 2416: 2410: 2397: 2396: 2392: 2382: 2380: 2371: 2370: 2366: 2350: 2349: 2345: 2299: 2298: 2294: 2288:(6370km–1700km) 2287: 2276: 2275: 2271: 2264: 2239: 2238: 2234: 2218: 2217: 2213: 2209: 2204: 2165: 2135: 2134: 2131: 2096: 2095: 2094:(87269) 2000 OO 2092: 2073: 2072: 2069: 2015: 2008: 1997: 1995:Semi-major axis 1981: 1946: 1937: 1935: 1903: 1883: 1873: 1855: 1845: 1844: 1823: 1807: 1795: 1789: 1786: 1784: 1778: 1777: 1775: 1774: 1769:If Jupiter had 1731: 1706: 1695: 1675: 1662: 1630: 1600: 1573: 1556: 1546: 1545: 1513: 1503: 1486: 1476: 1475: 1466: 1460: 1457: 1455: 1449: 1448: 1446: 1443: 1436: 1430: 1415: 1410: 1409: 1408: 1403: 1399: 1394: 1390: 1378: 1374: 1365: 1361: 1343: 1340: 1339: 1309: 1306: 1305: 1300: 1296: 1293: 1289:(0.000955  1288: 1287: 1260: 1253: 1252: 1219: 1215: 1207: 1206: 1152: 1146: 1143: 1141: 1135: 1134: 1132: 1128: 1127: 1118: 1117: 1104: 1097: 1094: 1090: 1089: 1074: 1071: 1066: 1065: 1050: 1044: 1036: 1030: 1027: 1025: 1019: 1018: 1016: 1012: 1003: 987: 984: 979: 969: 966: 961: 940: 925: 914: 908: 906: 898:semi-major axis 887: 880: 861: 824: 814: 805: 784: 771: 770: 760: 739: 734: 733: 729:, is given by: 728: 704: 698: 692:'s barycenter. 565: 536: 535: 531:Orbit insertion 521: 513: 512: 498: 490: 489: 465: 457: 453: 446: 445: 441:Lyapunov orbits 432: 431: 415: 405: 404: 380: 372: 368: 361: 360: 346:Surface gravity 321:Escape velocity 311: 303: 302: 283:Parabolic orbit 279: 278: 245: 243: 240:two-body orbits 231: 230: 221:Semi-major axis 186: 176: 172: 146: 145: 144: 143: 142: 132: 123: 122: 121: 111: 103: 102: 92: 83: 82: 81: 71: 63: 62: 61:asteroid system 55: 46: 45: 37: 28: 23: 22: 15: 12: 11: 5: 2669: 2667: 2659: 2658: 2653: 2648: 2643: 2633: 2632: 2628: 2627: 2615: 2603: 2591: 2579: 2567: 2555: 2534: 2533: 2496:(1): 268–275. 2483: 2473: 2442: 2435: 2414: 2408: 2390: 2364: 2343: 2292: 2269: 2262: 2232: 2219:"barycentre". 2210: 2208: 2205: 2203: 2202: 2197: 2192: 2187: 2185:Lagrange point 2182: 2180:Center of mass 2177: 2172: 2166: 2164: 2161: 2151: 2150: 2147: 2144: 2141: 2128: 2127: 2124: 2121: 2118: 2112: 2111: 2108: 2105: 2102: 2089: 2088: 2085: 2082: 2079: 2066: 2065: 2062: 2059: 2056: 2050: 2049: 2046: 2043: 2040: 2034: 2033: 2030: 2027: 2024: 2018: 2017: 2013:Orbital period 2010: 2003: 1992: 1980: 1977: 1945: 1942: 1933: 1927: 1926: 1912: 1909: 1906: 1902: 1897: 1890: 1886: 1880: 1876: 1870: 1864: 1861: 1858: 1854: 1821: 1806:'s orbit (1.02 1793: 1782: 1760: 1759: 1738: 1734: 1729: 1726: 1713: 1709: 1702: 1698: 1694: 1691: 1688: 1682: 1678: 1674: 1669: 1665: 1660: 1653: 1650: 1647: 1644: 1641: 1638: 1633: 1629: 1626: 1621: 1617: 1614: 1607: 1603: 1596: 1593: 1590: 1587: 1584: 1581: 1576: 1570: 1563: 1559: 1555: 1539: 1538: 1527: 1520: 1516: 1510: 1506: 1500: 1493: 1489: 1485: 1464: 1453: 1441: 1434: 1421:Motion of the 1414: 1411: 1407: 1406: 1397: 1388: 1372: 1358: 1357: 1354: 1353: 1350: 1347: 1344: 1337: 1335: 1332: 1327: 1324: 1320: 1319: 1316: 1313: 1310: 1303: 1301: 1294: 1291: 1285: 1283: 1278: 1275: 1271: 1270: 1267: 1264: 1261: 1250: 1248: 1245: 1242: 1239: 1233: 1232: 1229: 1226: 1223: 1222:  19,600 1220: 1213: 1204: 1202: 1197: 1194: 1188: 1187: 1184: 1181: 1178: 1175: 1172: 1167: 1164: 1158: 1157: 1150: 1139: 1130: 1125: 1120: 1115: 1110: 1099: 1095: 1092: 1087: 1082: 1077: 1072: 1069: 1063: 1058: 1043: 1042: 1034: 1023: 1014: 1010: 1005: 1001: 996: 990: 985: 982: 977: 972: 967: 964: 959: 953: 952: 939: 936: 923: 912: 907:, is given by 904: 894: 893: 885: 878: 873: 867: 859: 850: 849: 831: 827: 821: 817: 811: 808: 804: 799: 791: 787: 783: 778: 774: 767: 763: 757: 754: 751: 746: 742: 726: 700:Main article: 697: 694: 680:In astronomy, 623:center of mass 567: 566: 564: 563: 556: 549: 541: 538: 537: 534: 533: 528: 522: 519: 518: 515: 514: 511: 510: 505: 503:Gravity assist 499: 496: 495: 492: 491: 488: 487: 482: 477: 472: 466: 463: 462: 459: 458: 451: 448: 447: 444: 443: 438: 430: 429: 421: 417: 416: 411: 410: 407: 406: 403: 402: 397: 392: 387: 381: 378: 377: 374: 373: 366: 363: 362: 359: 358: 353: 348: 343: 338: 336:Orbital period 333: 328: 323: 318: 312: 309: 308: 305: 304: 301: 300: 298:Decaying orbit 295: 290: 285: 277: 276: 270: 263: 261:Transfer orbit 259: 258: 257: 255:Elliptic orbit 252: 250:Circular orbit 246: 237: 236: 233: 232: 229: 228: 223: 218: 213: 208: 203: 198: 193: 187: 182: 181: 178: 177: 170: 167: 166: 158: 157: 153: 152: 133: 126: 125: 124: 112: 105: 104: 93: 86: 85: 84: 72: 65: 64: 56: 49: 48: 47: 43: 42: 41: 40: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2668: 2657: 2654: 2652: 2649: 2647: 2644: 2642: 2639: 2638: 2636: 2626: 2621: 2616: 2614: 2604: 2602: 2592: 2590: 2580: 2578: 2573: 2568: 2566: 2556: 2554: 2549: 2544: 2540: 2529: 2525: 2521: 2517: 2513: 2509: 2504: 2499: 2495: 2491: 2490: 2477: 2474: 2460: 2456: 2452: 2446: 2443: 2438: 2436:0-7503-0062-0 2432: 2428: 2424: 2418: 2415: 2411: 2409:0-943396-51-4 2405: 2401: 2394: 2391: 2378: 2374: 2368: 2365: 2361: 2357: 2356:HowStuffWorks 2353: 2347: 2344: 2338: 2333: 2328: 2323: 2319: 2315: 2311: 2307: 2303: 2296: 2293: 2289: 2283: 2279: 2273: 2270: 2265: 2259: 2255: 2251: 2246: 2245: 2236: 2233: 2228: 2224: 2223: 2215: 2212: 2206: 2201: 2198: 2196: 2193: 2191: 2188: 2186: 2183: 2181: 2178: 2176: 2173: 2171: 2168: 2167: 2162: 2160: 2158: 2148: 2145: 2142: 2139: 2129: 2125: 2122: 2119: 2117: 2113: 2109: 2106: 2103: 2100: 2090: 2086: 2083: 2080: 2077: 2067: 2063: 2060: 2057: 2055: 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Berlin: 2207:References 581:barycentre 577:barycenter 470:Mass ratio 385:Barycenter 59:90 Antiope 2565:Astronomy 2503:0901.1690 1965:telemetry 1860:− 1737:⊕ 1725:≈ 1712:⊕ 1693:× 1687:≈ 1681:⊙ 1673:⋅ 1668:⊙ 1628:⋅ 1620:⇒ 1606:⊙ 1569:⋅ 1562:⊙ 1499:⋅ 1341:(9.58 AU) 1307:(5.20 AU) 1269:0.000646 1080:Secondary 756:⋅ 716:astronomy 631:dynamical 573:astronomy 310:Equations 238:Types of 136:eccentric 2528:16987581 2451:Horizons 2425:(1991). 2377:Archived 2163:See also 2009:(in AU) 2006:Apoapsis 1958:Brumberg 1349:696,000 1346:409,000 1326:333,000 1315:696,000 1312:742,000 1295:☉ 1277:333,000 1266:696,000 1241:333,000 1205:0.000254 1177:384,000 888:are the 864:distance 673:and the 98:and the 2625:Science 2553:Physics 2539:Portals 2508:Bibcode 2314:Bibcode 2229:. 1989. 2149:11,200 2133:2007 TG 2126:11,400 2110:12,800 2087:22,600 2064:47,000 2048:70,000 2032:92,600 1975:(TCB). 1934:Jupiter 1798:⁠ 1776:⁠ 1771:Mercury 1469:⁠ 1447:⁠ 1281:Jupiter 1196:0.0021 1174:0.0123 1155:⁠ 1133:⁠ 1056:Primary 1039:⁠ 1017:⁠ 862:is the 710:of the 671:Jupiter 616:kéntron 609:κέντρον 2526:  2433:  2406:  2306:Icarus 2260:  2107:1,078 2084:1,570 2061:2,600 2058:1,300 2045:3,410 2042:1,700 2029:4,100 2026:2,050 1990:Object 1800:≈ 0.08 1352:0.588 1330:Saturn 1244:Earth 1228:1,150 1225:2,110 1200:Charon 1186:0.732 1183:6,380 1180:4,670 932:within 890:masses 655:Charon 575:, the 79:Charon 2577:Stars 2524:S2CID 2498:arXiv 1826:apses 1380:Pluto 1368:tides 1334:95.2 1318:1.07 1231:1.83 1192:Pluto 1162:Earth 1129:(km) 1119:(km) 651:Pluto 627:orbit 599:barús 592:βαρύς 587: 191:Apsis 119:Earth 96:Earth 75:Pluto 2651:Mass 2467:2011 2431:ISBN 2404:ISBN 2385:2011 2258:ISBN 2146:967 2143:501 2123:937 2120:506 2104:549 2081:799 1998:(in 1896:> 1869:> 1804:Eris 1728:1530 1659:> 1613:> 1323:Sun 1274:Sun 1263:449 1170:Moon 896:The 881:and 718:and 708:foci 665:and 653:and 579:(or 117:and 100:Moon 77:and 2516:doi 2494:695 2484:372 2332:hdl 2322:doi 2310:246 2254:199 2136:422 2074:372 1948:In 1764:and 1690:2.3 1429:If 1286:318 1254:(1 1237:Sun 675:Sun 571:In 242:by 115:Sun 2637:: 2522:. 2514:. 2506:. 2492:. 2482:SQ 2354:. 2330:. 2320:. 2308:. 2304:. 2284:. 2280:. 2256:. 2097:67 2002:) 2000:AU 1940:. 1832:, 1745:AU 1720:km 1701:11 1697:10 1437:≫ 1256:AU 1247:1 1166:1 1109:) 1107:km 1098:) 1076:) 927:. 919:− 915:= 641:. 2541:: 2530:. 2518:: 2510:: 2500:: 2469:. 2439:. 2387:. 2340:. 2334:: 2324:: 2316:: 2266:. 1931:e 1911:e 1908:+ 1905:1 1901:1 1889:1 1885:R 1879:1 1875:r 1863:e 1857:1 1853:1 1834:e 1822:1 1819:r 1808:× 1794:1 1791:R 1787:/ 1783:1 1780:r 1733:m 1708:m 1677:m 1664:R 1652:t 1649:e 1646:n 1643:a 1640:l 1637:p 1632:m 1625:a 1616:1 1602:m 1595:t 1592:e 1589:n 1586:a 1583:l 1580:p 1575:m 1558:R 1554:a 1526:. 1519:1 1515:m 1509:2 1505:m 1492:1 1488:R 1484:a 1465:1 1462:R 1458:/ 1454:1 1451:r 1442:2 1439:m 1435:1 1432:m 1370:. 1298:) 1292:M 1258:) 1217:) 1214:♇ 1211:M 1151:1 1148:R 1144:/ 1140:1 1137:r 1126:1 1123:R 1116:1 1113:r 1105:( 1102:a 1096:E 1093:M 1091:( 1088:2 1085:m 1073:E 1070:M 1067:( 1064:1 1061:m 1035:1 1032:R 1028:/ 1024:1 1021:r 1011:1 1008:R 1002:1 999:r 993:a 989:) 986:E 983:M 978:2 975:m 971:) 968:E 965:M 960:1 957:m 924:1 921:r 917:a 913:2 910:r 905:2 902:r 886:2 883:m 879:1 876:m 870:a 860:1 857:r 830:2 826:m 820:1 816:m 810:+ 807:1 803:a 798:= 790:2 786:m 782:+ 777:1 773:m 766:2 762:m 753:a 750:= 745:1 741:r 727:1 724:r 619:) 613:( 602:) 596:( 560:e 553:t 546:v 428:) 424:( 275:) 266:( 36:. 20:)

Index

Barycentric coordinates (astronomy)
Barycenter (physics)

90 Antiope

Pluto
Charon

Earth
Moon

Sun
Earth

eccentric
binary stars

Orbital mechanics
Orbital elements
Apsis
Argument of periapsis
Eccentricity
Inclination
Mean anomaly
Orbital nodes
Semi-major axis
True anomaly
two-body orbits
Circular orbit
Elliptic orbit

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