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Spheroid

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2182: 2092: 213: 779: 2968: 40: 1743: 2523: 2247:. The major axis of the prolate spheroid does not run through the satellite's poles in this case, but through the two points on its equator directly facing toward and away from the primary. This combines with the smaller oblate distortion from the synchronous rotation to cause the body to become triaxial. 2028:
All modern geodetic ellipsoids are defined by the semi-major axis plus either the semi-minor axis (giving the aspect ratio), the flattening, or the first eccentricity. While these definitions are mathematically interchangeable, real-world calculations must lose some precision. To avoid confusion, an
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originally meant "an approximately spherical body", admitting irregularities even beyond the bi- or tri-axial ellipsoidal shape; that is how the term is used in some older papers on geodesy (for example, referring to truncated spherical harmonic expansions of the
1516: 1531: 2335: 2023: 774:{\displaystyle S_{\text{oblate}}=2\pi a^{2}\left(1+{\frac {1-e^{2}}{e}}\operatorname {arctanh} e\right)=2\pi a^{2}+\pi {\frac {c^{2}}{e}}\ln \left({\frac {1+e}{1-e}}\right)\qquad {\mbox{where}}\quad e^{2}=1-{\frac {c^{2}}{a^{2}}}.} 354: 827: 467: 1010:
and can no longer directly be identified with the eccentricity. Both of these results may be cast into many other forms using standard mathematical identities and relations between parameters of the ellipse.
2262:, used to analyze wave propagation and interference in space, are a series of concentric prolate spheroids with principal axes aligned along the direct line-of-sight between a transmitter and a receiver. 1177: 1087: 1919: 1850: 2340: 1935: 1199: 2590: 1387: 1738:{\displaystyle H(\beta ,\lambda )={\frac {c\left(2a^{2}+\left(c^{2}-a^{2}\right)\cos ^{2}\beta \right)}{2a\left(a^{2}+\left(c^{2}-a^{2}\right)\cos ^{2}\beta \right)^{\frac {3}{2}}}}.} 2518:{\displaystyle {\begin{aligned}A=B&={\tfrac {1}{5}}M\left(a^{2}+c^{2}\right),\\C&={\tfrac {1}{5}}M\left(a^{2}+b^{2}\right)={\tfrac {2}{5}}M\left(a^{2}\right),\end{aligned}}} 1930: 258: 2986: 956:{\displaystyle S_{\text{prolate}}=2\pi a^{2}\left(1+{\frac {c}{ae}}\arcsin \,e\right)\qquad {\mbox{where}}\quad e^{2}=1-{\frac {a^{2}}{c^{2}}}.} 383: 2235:
In contrast to being distorted into oblate spheroids via rapid rotation, celestial objects distort slightly into prolate spheroids via
2893: 2676: 1118: 1025: 2807: 2631: 2662: 1298:{\displaystyle {\boldsymbol {\sigma }}(\beta ,\lambda )=(a\cos \beta \cos \lambda ,a\cos \beta \sin \lambda ,c\sin \beta ),} 2621: 1867: 1792: 2282: 2538: 1856: 1511:{\displaystyle K(\beta ,\lambda )={\frac {c^{2}}{\left(a^{2}+\left(c^{2}-a^{2}\right)\cos ^{2}\beta \right)^{2}}},} 983: 801: 2329:. However, in a spheroid the minor axes are symmetrical. Therefore, our inertial terms along the major axes are: 2045:, prolate, and oblate spheroidal, where the polar axis is assumed to be the spin axis (or direction of the spin 117: 2306:
is that of an ellipsoid with an additional axis of symmetry. Given a description of a spheroid as having a
2243:, which becomes slightly more or less prolate in its orbit due to a slight eccentricity, causing intense 2050: 178: 150: 80: 76: 2972: 2909: 2835: 2146: 2136: 2862: 2914: 2641: 2170: 2112: 2061: 2018:{\displaystyle {\begin{aligned}e&={\sqrt {2f-f^{2}}}\\f&=1-{\sqrt {1-e^{2}}}\end{aligned}}} 1318: 1188: 174: 154: 2738: 2776: 2768: 2205: 2158: 2072: 1378: 201: 198: 1861:(usually simply eccentricity, as above) is often used instead of flattening. It is defined by: 3009: 3004: 2889: 2879: 2803: 2672: 2668: 2303: 2181: 2166: 2080: 2058: 186: 96: 1748:
Both of these curvatures are always positive, so that every point on a spheroid is elliptic.
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is similar but has a pointier end than a spheroid could. If the ellipse is rotated about its
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when they orbit a massive body in a close orbit. The most extreme example is Jupiter's moon
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The prolate spheroid is the approximate shape of the ball in several sports, such as in the
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is the distance from centre to pole along the symmetry axis. There are two possible cases:
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can be used to calculate the surface area of a prolate spheroid and vice versa. However,
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elements are shaped like prolate spheroids. In anatomy, near-spheroid organs such as
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of the Solar System approximate prolate spheroids in shape, though they are actually
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model uses a spheroid whose radius is 6,378.137 km (3,963.191 mi) at the
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The most common shapes for the density distribution of protons and neutrons in an
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ellipsoidal definition considers its own values to be exact in the form it gives.
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Greenburg, John L. (1995). "Isaac Newton and the Problem of the Earth's Shape".
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vector). Deformed nuclear shapes occur as a result of the competition between
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The equation of a tri-axial ellipsoid centred at the origin with semi-axes
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Many submarines have a shape which can be described as prolate spheroid.
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the Earth is often approximated by an oblate spheroid, known as the
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Introduction à la Géodésie et au geopositionnement par satellites
2169:. Earth's diverse cartographic and geodetic systems are based on 2626: 2236: 2161:'s theories for their interpretation, reasoned that Jupiter and 2979: 2826:(October 1973), "The Distance to the Crab Nebula and NP 0532", 993:
These formulas are identical in the sense that the formula for
2910:"What Do a Submarine, a Rocket and a Football Have in Common?" 165:
in the direction of its axis of rotation. For that reason, in
1772:, is the ratio of the polar to equatorial lengths, while the 1172:{\displaystyle {\tfrac {\pi }{6}}A^{2}C\approx 0.523A^{2}C.} 1082:{\displaystyle {\tfrac {4}{3}}\pi a^{2}c\approx 4.19a^{2}c.} 216:
The assignment of semi-axes on a spheroid. It is oblate if
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The oblate spheroid is the approximate shape of rotating
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The prolate spheroid is generated by rotation about the
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Publications of the Astronomical Society of the Pacific
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The relations between eccentricity and flattening are:
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The oblate spheroid is generated by rotation about the
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The term is also used to describe the shape of some
1914:{\displaystyle e={\sqrt {1-{\frac {c^{2}}{a^{2}}}}}} 1845:{\displaystyle f={\frac {a-c}{a}}=1-{\frac {c}{a}}.} 87:
about one of its principal axes; in other words, an
2795: 2584: 2517: 2017: 1913: 1844: 1737: 1510: 1297: 1171: 1081: 955: 773: 461: 348: 2585:{\displaystyle M={\tfrac {4}{3}}\pi a^{2}c\rho .} 185:and 6,356.752 km (3,949.903 mi) at the 161:) is not quite a sphere, but instead is slightly 2798:The Story of Civilization: The Age of Louis XIV 1019:The volume inside a spheroid (of any kind) is 476:is the equatorial radius of the spheroid, and 2083:is also a shape of archaeological artifacts. 2071:. Rotating equilibrium spheroids include the 1189:Radius of the Earth § Radii of curvature 8: 2794:Durant, Will; Durant, Ariel (28 July 1997). 2714:A derivation of this result may be found at 2691:A derivation of this result may be found at 2717:"Prolate Spheroid - from Wolfram MathWorld" 2302:For a spheroid having uniform density, the 2694:"Oblate Spheroid - from Wolfram MathWorld" 2127:. Saturn is the most oblate planet in the 2847: 2567: 2548: 2540: 2498: 2475: 2461: 2448: 2424: 2396: 2383: 2359: 2339: 2337: 2003: 1991: 1963: 1948: 1934: 1932: 1901: 1891: 1885: 1877: 1869: 1829: 1802: 1794: 1718: 1701: 1686: 1673: 1655: 1620: 1605: 1592: 1574: 1556: 1533: 1497: 1480: 1465: 1452: 1434: 1418: 1412: 1389: 1203: 1201: 1157: 1138: 1122: 1120: 1067: 1048: 1029: 1027: 970:-axis of an ellipse with semi-major axis 942: 932: 926: 911: 899: 889: 871: 854: 835: 829: 788:-axis of an ellipse with semi-major axis 760: 750: 744: 729: 717: 686: 665: 659: 647: 608: 595: 578: 559: 553: 445: 435: 429: 418: 407: 394: 387: 385: 332: 322: 316: 305: 295: 289: 278: 268: 262: 260: 2888:(6 ed.). Elsevier Health Sciences. 2886:Introduction to Vascular Ultrasonography 211: 33:Spheroids with vertical rotational axes 2884:John Pellerito, Joseph F Polak (2012). 2719:. Mathworld.wolfram.com. 7 October 2003 2653: 1204: 2298:Ellipsoid § Dynamical properties 1112:is the polar diameter, the volume is 252:aligned along the coordinate axes is 46: 27:Surface formed by rotating an ellipse 7: 2165:are oblate spheroids owing to their 102:If the ellipse is rotated about its 2532:is the mass of the body defined as 2099:is a slight oblate spheroid with a 1193:Let a spheroid be parameterized as 177:, instead of a sphere. The current 2863:"Nuclear fission - Fission theory" 25: 2943:MathWorld--A Wolfram Web Resource 2966: 2123:, and the quickly spinning star 1102:is the equatorial diameter, and 359:The equation of a spheroid with 38: 1762:of an oblate spheroid/ellipse, 982:may again be identified as the 906: 898: 724: 716: 145:Due to the combined effects of 2632:Prolate spheroidal coordinates 1550: 1538: 1406: 1394: 1289: 1226: 1220: 1208: 1: 2622:Oblate spheroidal coordinates 2737:Brial P., Shaalan C.(2009), 2157:'s pendulum experiments and 2173:, all of which are oblate. 2053:repulsion between protons, 2033:Occurrence and applications 3026: 2295: 1186: 2753:History of Exact Sciences 2281:may be measured by their 800:may be identified as the 37: 2824:Trimble, Virginia Louise 2759:(4). Springer: 371–391. 2661:Torge, Wolfgang (2001). 2067:Spheroids are common in 811:A prolate spheroid with 532:An oblate spheroid with 2987:Encyclopædia Britannica 2867:Encyclopedia Britannica 2696:. Mathworld.wolfram.com 1377:. Then, the spheroid's 66:ellipsoid of revolution 2990:(11th ed.). 1911. 2586: 2519: 2190: 2104: 2019: 1915: 1846: 1739: 1512: 1299: 1173: 1083: 957: 775: 463: 350: 237: 226:(left) and prolate if 2587: 2520: 2184: 2094: 2020: 1916: 1847: 1740: 1513: 1300: 1174: 1084: 958: 776: 519:reduces to a sphere. 464: 351: 215: 179:World Geodetic System 2975:at Wikimedia Commons 2539: 2336: 2292:Dynamical properties 2171:reference ellipsoids 2137:planetary flattening 1931: 1868: 1793: 1532: 1388: 1200: 1119: 1026: 974:and semi-minor axis 828: 792:and semi-minor axis 552: 384: 367:is given by setting 259: 70:rotational ellipsoid 2937:Weisstein, Eric W. 2915:Scientific American 2840:1973PASP...85..579T 2642:Translation of axes 2283:long and short axes 2206:triaxial ellipsoids 2115:, including Earth, 1319:parametric latitude 175:reference ellipsoid 155:figure of the Earth 130:, flattened like a 124:, the result is an 112:, elongated like a 64:, also known as an 34: 2765:10.1007/BF00374704 2582: 2558: 2515: 2513: 2485: 2434: 2369: 2191: 2159:Christiaan Huygens 2105: 2073:Maclaurin spheroid 2015: 2013: 1911: 1842: 1735: 1508: 1379:Gaussian curvature 1295: 1169: 1132: 1079: 1039: 953: 904: 771: 722: 505:: prolate spheroid 459: 346: 238: 202:geopotential model 106:, the result is a 32: 2971:Media related to 2918:. 8 November 2010 2669:Walter de Gruyter 2557: 2484: 2433: 2368: 2313:, and minor axes 2304:moment of inertia 2177:Prolate spheroids 2167:centrifugal force 2009: 1969: 1909: 1907: 1837: 1818: 1730: 1726: 1503: 1131: 1038: 948: 903: 884: 838: 821:has surface area 766: 721: 710: 674: 618: 562: 493:: oblate spheroid 451: 424: 338: 311: 284: 118:American football 97:circular symmetry 95:. A spheroid has 58: 57: 16:(Redirected from 3017: 2991: 2983: 2981:"Spheroid"  2970: 2954: 2953: 2951: 2949: 2934: 2928: 2927: 2925: 2923: 2906: 2900: 2899: 2877: 2871: 2870: 2859: 2853: 2852: 2851: 2820: 2814: 2813: 2801: 2791: 2785: 2784: 2748: 2742: 2735: 2729: 2728: 2726: 2724: 2712: 2706: 2705: 2703: 2701: 2689: 2683: 2682: 2667:(3rd ed.). 2658: 2637:Rotation of axes 2607:Equatorial bulge 2602:Ellipsoidal dome 2591: 2589: 2588: 2583: 2572: 2571: 2559: 2550: 2531: 2524: 2522: 2521: 2516: 2514: 2507: 2503: 2502: 2486: 2477: 2471: 2467: 2466: 2465: 2453: 2452: 2435: 2426: 2406: 2402: 2401: 2400: 2388: 2387: 2370: 2361: 2328: 2324: 2320: 2316: 2312: 2141:equatorial bulge 2135:of 0.09796. See 2113:celestial bodies 2087:Oblate spheroids 2077:Jacobi ellipsoid 2069:3D cell cultures 2047:angular momentum 2024: 2022: 2021: 2016: 2014: 2010: 2008: 2007: 1992: 1970: 1968: 1967: 1949: 1920: 1918: 1917: 1912: 1910: 1908: 1906: 1905: 1896: 1895: 1886: 1878: 1851: 1849: 1848: 1843: 1838: 1830: 1819: 1814: 1803: 1785: 1771: 1744: 1742: 1741: 1736: 1731: 1729: 1728: 1727: 1719: 1717: 1713: 1706: 1705: 1696: 1692: 1691: 1690: 1678: 1677: 1660: 1659: 1637: 1636: 1632: 1625: 1624: 1615: 1611: 1610: 1609: 1597: 1596: 1579: 1578: 1557: 1517: 1515: 1514: 1509: 1504: 1502: 1501: 1496: 1492: 1485: 1484: 1475: 1471: 1470: 1469: 1457: 1456: 1439: 1438: 1423: 1422: 1413: 1376: 1368: 1367: 1365: 1364: 1361: 1358: 1347: 1345: 1344: 1341: 1338: 1325: 1314:reduced latitude 1311: 1304: 1302: 1301: 1296: 1207: 1178: 1176: 1175: 1170: 1162: 1161: 1143: 1142: 1133: 1124: 1111: 1101: 1088: 1086: 1085: 1080: 1072: 1071: 1053: 1052: 1040: 1031: 1005: 1001: 981: 977: 973: 969: 962: 960: 959: 954: 949: 947: 946: 937: 936: 927: 916: 915: 905: 901: 897: 893: 885: 883: 872: 859: 858: 840: 839: 836: 820: 799: 795: 791: 787: 780: 778: 777: 772: 767: 765: 764: 755: 754: 745: 734: 733: 723: 719: 715: 711: 709: 698: 687: 675: 670: 669: 660: 652: 651: 633: 629: 619: 614: 613: 612: 596: 583: 582: 564: 563: 560: 541: 518: 504: 492: 479: 475: 468: 466: 465: 460: 452: 450: 449: 440: 439: 430: 425: 423: 422: 413: 412: 411: 399: 398: 388: 376: 362: 355: 353: 352: 347: 339: 337: 336: 327: 326: 317: 312: 310: 309: 300: 299: 290: 285: 283: 282: 273: 272: 263: 251: 247: 243: 235: 225: 109:prolate spheroid 42: 35: 21: 3025: 3024: 3020: 3019: 3018: 3016: 3015: 3014: 2995: 2994: 2978: 2963: 2958: 2957: 2947: 2945: 2936: 2935: 2931: 2921: 2919: 2908: 2907: 2903: 2896: 2883: 2878: 2874: 2861: 2860: 2856: 2822: 2821: 2817: 2810: 2793: 2792: 2788: 2750: 2749: 2745: 2736: 2732: 2722: 2720: 2715: 2713: 2709: 2699: 2697: 2692: 2690: 2686: 2679: 2671:. p. 104. 2660: 2659: 2655: 2650: 2598: 2563: 2537: 2536: 2529: 2512: 2511: 2494: 2490: 2457: 2444: 2443: 2439: 2417: 2411: 2410: 2392: 2379: 2378: 2374: 2352: 2334: 2333: 2326: 2322: 2318: 2314: 2310: 2300: 2294: 2208:. Examples are 2179: 2153:, working from 2089: 2055:surface tension 2051:electromagnetic 2035: 2012: 2011: 1999: 1978: 1972: 1971: 1959: 1941: 1929: 1928: 1897: 1887: 1866: 1865: 1804: 1791: 1790: 1783: 1763: 1754: 1697: 1682: 1669: 1668: 1664: 1651: 1650: 1646: 1645: 1638: 1616: 1601: 1588: 1587: 1583: 1570: 1566: 1562: 1558: 1530: 1529: 1476: 1461: 1448: 1447: 1443: 1430: 1429: 1425: 1424: 1414: 1386: 1385: 1370: 1362: 1359: 1356: 1355: 1353: 1342: 1339: 1336: 1335: 1333: 1331: 1323: 1309: 1198: 1197: 1191: 1185: 1153: 1134: 1117: 1116: 1103: 1093: 1063: 1044: 1024: 1023: 1017: 1003: 1000: 994: 979: 975: 971: 967: 938: 928: 907: 876: 864: 860: 850: 831: 826: 825: 812: 797: 793: 789: 785: 756: 746: 725: 699: 688: 682: 661: 643: 604: 597: 588: 584: 574: 555: 550: 549: 533: 530: 525: 510: 496: 484: 477: 473: 441: 431: 414: 403: 390: 389: 382: 381: 368: 360: 328: 318: 301: 291: 274: 264: 257: 256: 249: 245: 241: 227: 217: 210: 199:Earth's gravity 127:oblate spheroid 91:with two equal 28: 23: 22: 15: 12: 11: 5: 3023: 3021: 3013: 3012: 3007: 2997: 2996: 2993: 2992: 2976: 2962: 2961:External links 2959: 2956: 2955: 2929: 2901: 2894: 2872: 2854: 2849:10.1086/129507 2815: 2808: 2786: 2743: 2730: 2707: 2684: 2677: 2652: 2651: 2649: 2646: 2645: 2644: 2639: 2634: 2629: 2624: 2619: 2614: 2609: 2604: 2597: 2594: 2593: 2592: 2581: 2578: 2575: 2570: 2566: 2562: 2556: 2553: 2547: 2544: 2526: 2525: 2510: 2506: 2501: 2497: 2493: 2489: 2483: 2480: 2474: 2470: 2464: 2460: 2456: 2451: 2447: 2442: 2438: 2432: 2429: 2423: 2420: 2418: 2416: 2413: 2412: 2409: 2405: 2399: 2395: 2391: 2386: 2382: 2377: 2373: 2367: 2364: 2358: 2355: 2353: 2351: 2348: 2345: 2342: 2341: 2293: 2290: 2212:'s satellites 2178: 2175: 2088: 2085: 2039:atomic nucleus 2034: 2031: 2026: 2025: 2006: 2002: 1998: 1995: 1990: 1987: 1984: 1981: 1979: 1977: 1974: 1973: 1966: 1962: 1958: 1955: 1952: 1947: 1944: 1942: 1940: 1937: 1936: 1922: 1921: 1904: 1900: 1894: 1890: 1884: 1881: 1876: 1873: 1853: 1852: 1841: 1836: 1833: 1828: 1825: 1822: 1817: 1813: 1810: 1807: 1801: 1798: 1753: 1750: 1746: 1745: 1734: 1725: 1722: 1716: 1712: 1709: 1704: 1700: 1695: 1689: 1685: 1681: 1676: 1672: 1667: 1663: 1658: 1654: 1649: 1644: 1641: 1635: 1631: 1628: 1623: 1619: 1614: 1608: 1604: 1600: 1595: 1591: 1586: 1582: 1577: 1573: 1569: 1565: 1561: 1555: 1552: 1549: 1546: 1543: 1540: 1537: 1523:mean curvature 1519: 1518: 1507: 1500: 1495: 1491: 1488: 1483: 1479: 1474: 1468: 1464: 1460: 1455: 1451: 1446: 1442: 1437: 1433: 1428: 1421: 1417: 1411: 1408: 1405: 1402: 1399: 1396: 1393: 1306: 1305: 1294: 1291: 1288: 1285: 1282: 1279: 1276: 1273: 1270: 1267: 1264: 1261: 1258: 1255: 1252: 1249: 1246: 1243: 1240: 1237: 1234: 1231: 1228: 1225: 1222: 1219: 1216: 1213: 1210: 1206: 1184: 1181: 1180: 1179: 1168: 1165: 1160: 1156: 1152: 1149: 1146: 1141: 1137: 1130: 1127: 1090: 1089: 1078: 1075: 1070: 1066: 1062: 1059: 1056: 1051: 1047: 1043: 1037: 1034: 1016: 1013: 998: 964: 963: 952: 945: 941: 935: 931: 925: 922: 919: 914: 910: 896: 892: 888: 882: 879: 875: 870: 867: 863: 857: 853: 849: 846: 843: 834: 782: 781: 770: 763: 759: 753: 749: 743: 740: 737: 732: 728: 714: 708: 705: 702: 697: 694: 691: 685: 681: 678: 673: 668: 664: 658: 655: 650: 646: 642: 639: 636: 632: 628: 625: 622: 617: 611: 607: 603: 600: 594: 591: 587: 581: 577: 573: 570: 567: 558: 529: 526: 524: 521: 507: 506: 494: 472:The semi-axis 470: 469: 458: 455: 448: 444: 438: 434: 428: 421: 417: 410: 406: 402: 397: 393: 357: 356: 345: 342: 335: 331: 325: 321: 315: 308: 304: 298: 294: 288: 281: 277: 271: 267: 209: 206: 93:semi-diameters 56: 55: 50: 44: 43: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3022: 3011: 3008: 3006: 3003: 3002: 3000: 2989: 2988: 2982: 2977: 2974: 2969: 2965: 2964: 2960: 2944: 2940: 2933: 2930: 2917: 2916: 2911: 2905: 2902: 2897: 2895:9781455737666 2891: 2887: 2881: 2876: 2873: 2868: 2864: 2858: 2855: 2850: 2845: 2841: 2837: 2833: 2829: 2825: 2819: 2816: 2811: 2805: 2802:. MJF Books. 2800: 2799: 2790: 2787: 2782: 2778: 2774: 2770: 2766: 2762: 2758: 2754: 2747: 2744: 2740: 2734: 2731: 2718: 2711: 2708: 2695: 2688: 2685: 2680: 2678:9783110170726 2674: 2670: 2666: 2665: 2657: 2654: 2647: 2643: 2640: 2638: 2635: 2633: 2630: 2628: 2625: 2623: 2620: 2618: 2615: 2613: 2612:Great ellipse 2610: 2608: 2605: 2603: 2600: 2599: 2595: 2579: 2576: 2573: 2568: 2564: 2560: 2554: 2551: 2545: 2542: 2535: 2534: 2533: 2508: 2504: 2499: 2495: 2491: 2487: 2481: 2478: 2472: 2468: 2462: 2458: 2454: 2449: 2445: 2440: 2436: 2430: 2427: 2421: 2419: 2414: 2407: 2403: 2397: 2393: 2389: 2384: 2380: 2375: 2371: 2365: 2362: 2356: 2354: 2349: 2346: 2343: 2332: 2331: 2330: 2309: 2305: 2299: 2291: 2289: 2286: 2284: 2280: 2276: 2272: 2268: 2267:atomic nuclei 2263: 2261: 2260:Fresnel zones 2257: 2253: 2248: 2246: 2242: 2238: 2233: 2231: 2227: 2223: 2219: 2215: 2211: 2207: 2203: 2198: 2196: 2188: 2183: 2176: 2174: 2172: 2168: 2164: 2160: 2156: 2152: 2148: 2147:Enlightenment 2144: 2143:for details. 2142: 2138: 2134: 2130: 2126: 2122: 2118: 2114: 2110: 2102: 2098: 2093: 2086: 2084: 2082: 2078: 2074: 2070: 2065: 2063: 2062:shell effects 2060: 2056: 2052: 2048: 2044: 2040: 2032: 2030: 2004: 2000: 1996: 1993: 1988: 1985: 1982: 1980: 1975: 1964: 1960: 1956: 1953: 1950: 1945: 1943: 1938: 1927: 1926: 1925: 1902: 1898: 1892: 1888: 1882: 1879: 1874: 1871: 1864: 1863: 1862: 1860: 1859: 1839: 1834: 1831: 1826: 1823: 1820: 1815: 1811: 1808: 1805: 1799: 1796: 1789: 1788: 1787: 1781: 1778:(also called 1777: 1776: 1770: 1766: 1761: 1760: 1751: 1749: 1732: 1723: 1720: 1714: 1710: 1707: 1702: 1698: 1693: 1687: 1683: 1679: 1674: 1670: 1665: 1661: 1656: 1652: 1647: 1642: 1639: 1633: 1629: 1626: 1621: 1617: 1612: 1606: 1602: 1598: 1593: 1589: 1584: 1580: 1575: 1571: 1567: 1563: 1559: 1553: 1547: 1544: 1541: 1535: 1528: 1527: 1526: 1524: 1505: 1498: 1493: 1489: 1486: 1481: 1477: 1472: 1466: 1462: 1458: 1453: 1449: 1444: 1440: 1435: 1431: 1426: 1419: 1415: 1409: 1403: 1400: 1397: 1391: 1384: 1383: 1382: 1380: 1374: 1351: 1329: 1321: 1320: 1315: 1292: 1286: 1283: 1280: 1277: 1274: 1271: 1268: 1265: 1262: 1259: 1256: 1253: 1250: 1247: 1244: 1241: 1238: 1235: 1232: 1229: 1223: 1217: 1214: 1211: 1196: 1195: 1194: 1190: 1182: 1166: 1163: 1158: 1154: 1150: 1147: 1144: 1139: 1135: 1128: 1125: 1115: 1114: 1113: 1110: 1106: 1100: 1096: 1076: 1073: 1068: 1064: 1060: 1057: 1054: 1049: 1045: 1041: 1035: 1032: 1022: 1021: 1020: 1014: 1012: 1009: 1006:then becomes 997: 991: 989: 985: 978:; therefore, 950: 943: 939: 933: 929: 923: 920: 917: 912: 908: 894: 890: 886: 880: 877: 873: 868: 865: 861: 855: 851: 847: 844: 841: 832: 824: 823: 822: 819: 815: 809: 807: 803: 768: 761: 757: 751: 747: 741: 738: 735: 730: 726: 712: 706: 703: 700: 695: 692: 689: 683: 679: 676: 671: 666: 662: 656: 653: 648: 644: 640: 637: 634: 630: 626: 623: 620: 615: 609: 605: 601: 598: 592: 589: 585: 579: 575: 571: 568: 565: 556: 548: 547: 546: 545: 540: 536: 527: 522: 520: 517: 513: 503: 499: 495: 491: 487: 483: 482: 481: 456: 453: 446: 442: 436: 432: 426: 419: 415: 408: 404: 400: 395: 391: 380: 379: 378: 375: 371: 366: 365:symmetry axis 343: 340: 333: 329: 323: 319: 313: 306: 302: 296: 292: 286: 279: 275: 269: 265: 255: 254: 253: 234: 230: 224: 220: 214: 207: 205: 203: 200: 195: 190: 188: 184: 180: 176: 172: 168: 164: 160: 156: 152: 148: 143: 141: 137: 133: 129: 128: 123: 119: 115: 111: 110: 105: 100: 98: 94: 90: 86: 82: 78: 75: 71: 67: 63: 54: 51: 49: 45: 41: 36: 30: 19: 2985: 2946:. Retrieved 2942: 2932: 2920:. Retrieved 2913: 2904: 2885: 2875: 2866: 2857: 2834:(507): 579, 2831: 2827: 2818: 2797: 2789: 2756: 2752: 2746: 2733: 2721:. Retrieved 2710: 2698:. Retrieved 2687: 2663: 2656: 2527: 2301: 2287: 2264: 2254:such as the 2249: 2237:tidal forces 2234: 2228:' satellite 2199: 2192: 2151:Isaac Newton 2145: 2129:Solar System 2106: 2066: 2036: 2027: 1923: 1858:eccentricity 1857: 1854: 1779: 1773: 1768: 1764: 1759:aspect ratio 1757: 1755: 1752:Aspect ratio 1747: 1520: 1372: 1349: 1317: 1313: 1307: 1192: 1108: 1104: 1098: 1094: 1091: 1018: 995: 992: 984:eccentricity 965: 817: 813: 810: 802:eccentricity 796:, therefore 783: 544:surface area 538: 534: 531: 515: 511: 509:The case of 508: 501: 497: 489: 485: 471: 373: 369: 358: 239: 232: 228: 222: 218: 193: 191: 157:(and of all 144: 126: 125: 108: 107: 101: 79:obtained by 69: 65: 61: 59: 52: 47: 29: 2256:Crab Nebula 2155:Jean Richer 2095:The planet 167:cartography 134:or a plain 2999:Categories 2939:"Spheroid" 2809:1567310192 2648:References 2308:major axis 2296:See also: 2275:lanthanide 2195:rugby ball 2187:rugby ball 2149:scientist 2133:flattening 2111:and other 2103:of 0.06487 2101:flattening 1855:The first 1780:oblateness 1775:flattening 1187:See also: 523:Properties 122:minor axis 114:rugby ball 104:major axis 2973:Spheroids 2781:121268606 2577:ρ 2561:π 2245:volcanism 2218:Enceladus 2131:, with a 2043:spherical 1997:− 1989:− 1957:− 1883:− 1827:− 1809:− 1711:β 1708:⁡ 1680:− 1630:β 1627:⁡ 1599:− 1548:λ 1542:β 1490:β 1487:⁡ 1459:− 1404:λ 1398:β 1328:longitude 1287:β 1284:⁡ 1272:λ 1269:⁡ 1263:β 1260:⁡ 1248:λ 1245:⁡ 1239:β 1236:⁡ 1218:λ 1212:β 1205:σ 1183:Curvature 1148:≈ 1126:π 1058:≈ 1042:π 1008:imaginary 924:− 848:π 742:− 704:− 680:⁡ 657:π 641:π 624:⁡ 602:− 572:π 192:The word 163:flattened 89:ellipsoid 18:Spheroids 3010:Quadrics 3005:Surfaces 2880:Page 559 2773:41134011 2596:See also 2271:actinide 2200:Several 2081:Spheroid 2075:and the 1767: : 1521:and its 1371:−π < 236:(right). 208:Equation 194:spheroid 151:rotation 81:rotating 62:spheroid 2922:13 June 2836:Bibcode 2723:24 June 2700:24 June 2664:Geodesy 2617:Lentoid 2269:of the 2252:nebulae 2230:Miranda 2121:Jupiter 2109:planets 2097:Jupiter 2059:quantum 1375:< +π 1366:⁠ 1354:⁠ 1346:⁠ 1334:⁠ 1326:is the 1312:is the 988:ellipse 986:. (See 837:prolate 806:ellipse 804:. (See 621:arctanh 363:as the 183:Equator 171:geodesy 159:planets 147:gravity 136:M&M 85:ellipse 77:surface 74:quadric 72:, is a 53:prolate 2948:16 May 2892:  2806:  2779:  2771:  2675:  2528:where 2325:, and 2279:testis 2226:Uranus 2222:Tethys 2220:, and 2210:Saturn 2125:Altair 2117:Saturn 1352:< + 1330:, and 1308:where 1015:Volume 999:oblate 887:arcsin 561:oblate 153:, the 140:sphere 132:lentil 116:. The 48:oblate 2777:S2CID 2769:JSTOR 2741:, p.8 2627:Ovoid 2315:a = b 2214:Mimas 2202:moons 2163:Earth 1348:< 1151:0.523 902:where 816:> 720:where 537:< 500:> 488:< 231:> 221:< 187:poles 2950:2018 2924:2015 2890:ISBN 2882:in: 2804:ISBN 2725:2014 2702:2014 2673:ISBN 2273:and 2265:The 2224:and 2139:and 2057:and 2041:are 1756:The 1369:and 1061:4.19 990:.) 542:has 528:Area 248:and 169:and 149:and 2844:doi 2761:doi 1699:cos 1618:cos 1525:is 1478:cos 1381:is 1316:or 1281:sin 1266:sin 1257:cos 1242:cos 1233:cos 1107:= 2 1097:= 2 1092:If 808:.) 204:). 83:an 68:or 3001:: 2984:. 2941:. 2912:. 2865:. 2842:, 2832:85 2830:, 2775:. 2767:. 2757:49 2755:. 2321:, 2285:. 2258:. 2241:Io 2232:. 2216:, 2197:. 2185:A 2119:, 2079:. 2064:. 1782:) 1322:, 677:ln 514:= 457:1. 377:: 372:= 344:1. 244:, 189:. 142:. 99:. 60:A 2952:. 2926:. 2898:. 2869:. 2846:: 2838:: 2812:. 2783:. 2763:: 2727:. 2704:. 2681:. 2580:. 2574:c 2569:2 2565:a 2555:3 2552:4 2546:= 2543:M 2530:M 2509:, 2505:) 2500:2 2496:a 2492:( 2488:M 2482:5 2479:2 2473:= 2469:) 2463:2 2459:b 2455:+ 2450:2 2446:a 2441:( 2437:M 2431:5 2428:1 2422:= 2415:C 2408:, 2404:) 2398:2 2394:c 2390:+ 2385:2 2381:a 2376:( 2372:M 2366:5 2363:1 2357:= 2350:B 2347:= 2344:A 2327:B 2323:A 2319:C 2311:c 2189:. 2005:2 2001:e 1994:1 1986:1 1983:= 1976:f 1965:2 1961:f 1954:f 1951:2 1946:= 1939:e 1903:2 1899:a 1893:2 1889:c 1880:1 1875:= 1872:e 1840:. 1835:a 1832:c 1824:1 1821:= 1816:a 1812:c 1806:a 1800:= 1797:f 1784:f 1769:a 1765:c 1733:. 1724:2 1721:3 1715:) 1703:2 1694:) 1688:2 1684:a 1675:2 1671:c 1666:( 1662:+ 1657:2 1653:a 1648:( 1643:a 1640:2 1634:) 1622:2 1613:) 1607:2 1603:a 1594:2 1590:c 1585:( 1581:+ 1576:2 1572:a 1568:2 1564:( 1560:c 1554:= 1551:) 1545:, 1539:( 1536:H 1506:, 1499:2 1494:) 1482:2 1473:) 1467:2 1463:a 1454:2 1450:c 1445:( 1441:+ 1436:2 1432:a 1427:( 1420:2 1416:c 1410:= 1407:) 1401:, 1395:( 1392:K 1373:λ 1363:2 1360:/ 1357:π 1350:β 1343:2 1340:/ 1337:π 1332:− 1324:λ 1310:β 1293:, 1290:) 1278:c 1275:, 1254:a 1251:, 1230:a 1227:( 1224:= 1221:) 1215:, 1209:( 1167:. 1164:C 1159:2 1155:A 1145:C 1140:2 1136:A 1129:6 1109:c 1105:C 1099:a 1095:A 1077:. 1074:c 1069:2 1065:a 1055:c 1050:2 1046:a 1036:3 1033:4 1004:e 996:S 980:e 976:a 972:c 968:z 951:. 944:2 940:c 934:2 930:a 921:1 918:= 913:2 909:e 895:) 891:e 881:e 878:a 874:c 869:+ 866:1 862:( 856:2 852:a 845:2 842:= 833:S 818:a 814:c 798:e 794:c 790:a 786:z 769:. 762:2 758:a 752:2 748:c 739:1 736:= 731:2 727:e 713:) 707:e 701:1 696:e 693:+ 690:1 684:( 672:e 667:2 663:c 654:+ 649:2 645:a 638:2 635:= 631:) 627:e 616:e 610:2 606:e 599:1 593:+ 590:1 586:( 580:2 576:a 569:2 566:= 557:S 539:a 535:c 516:c 512:a 502:a 498:c 490:a 486:c 478:c 474:a 454:= 447:2 443:c 437:2 433:z 427:+ 420:2 416:a 409:2 405:y 401:+ 396:2 392:x 374:b 370:a 361:z 341:= 334:2 330:c 324:2 320:z 314:+ 307:2 303:b 297:2 293:y 287:+ 280:2 276:a 270:2 266:x 250:c 246:b 242:a 233:a 229:c 223:a 219:c 20:)

Index

Spheroids

quadric
surface
rotating
ellipse
ellipsoid
semi-diameters
circular symmetry
major axis
rugby ball
American football
minor axis
lentil
M&M
sphere
gravity
rotation
figure of the Earth
planets
flattened
cartography
geodesy
reference ellipsoid
World Geodetic System
Equator
poles
Earth's gravity
geopotential model

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