astro.wikisort.org - Asteroid804 Hispania is a minor planet orbiting the Sun. It was discovered from Barcelona (Spain) on 20 March 1915 by Josep Comas Solá (1868–1937), the first asteroid to be discovered by a Spaniard.
804 Hispania|
Discovered by | J. Comas Solá |
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Discovery date | 20 March 1915 |
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MPC designation | (804) Hispania |
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Pronunciation | [1][2] |
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Named after | Spain |
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Alternative designations | 1915 WT |
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Minor planet category | Main belt |
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Adjectives | Hispanian[2] |
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Epoch 31 July 2016 (JD 2457600.5) |
Uncertainty parameter 0 |
Observation arc | 39,655 d (108.57 yr) |
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Aphelion | 3.2343 AU (483.84 Gm) |
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Perihelion | 2.4418 AU (365.29 Gm) |
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Semi-major axis | 2.8381 AU (424.57 Gm) |
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Eccentricity | 0.13961 |
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Orbital period (sidereal) | 4.78 yr (1746.3 d) |
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Average orbital speed | 17.60 km/s |
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Mean anomaly | 277.552° |
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Mean motion | 0° 12m 22.104s / day |
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Inclination | 15.395° |
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Longitude of ascending node | 347.611° |
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Argument of perihelion | 344.626° |
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Earth MOID | 1.43481 AU (214.645 Gm) |
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Jupiter MOID | 2.16034 AU (323.182 Gm) |
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TJupiter | 3.244 |
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Dimensions | 157.30 km[citation needed] |
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Mean radius | 78.79±2.9 km[3] 74.125±2.04 km[4] |
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Mass | (5.00±1.78)×1018 kg[4] |
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Mean density | 2.93±1.06 g/cm3[4] |
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Equatorial surface gravity | ~0.107m/s2 |
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Equatorial escape velocity | ~129.9m/s |
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Synodic rotation period | 14.845 h (0.6185 d)[3] 7.405±0.010 h[5] |
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Geometric albedo | 0.0520±0.004 |
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Temperature | ~167.4K |
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Spectral type | P |
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Absolute magnitude (H) | 7.84 |
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Hispania is a carbonaceous C-type asteroid. Busarev and Taran (2002) classed it as CP type with a spectrum that shows a highly hydrated body.[6] It has a diameter of 122 kilometers according to measurements made with the W. M. Keck Observatory. This is 30% smaller than the size estimated from the IRAS observatory data. It has a size ratio of 1.16 between its major and minor axes.[7] Two alternate rotation periods have been found for this asteroid: 7.4 hours and double that at 14.8 hours. To explain this discrepancy, it is possible the asteroid has a peculiar shape or it may be a double asteroid.[4]
References
- Webster, Noah (1884), A Practical Dictionary of the English Language
- "Hispanian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Calabresi, M.; Roselli, G. (April 2001), "The rotation period of 804 Hispania: Some considerations on its nature", Astronomy and Astrophysics, 369: 305–307, Bibcode:2001A&A...369..305C, doi:10.1051/0004-6361:20010114.
- Busarev, V. V.; Taran, M. N. (November 2002), "On the spectral similarity of carbonaceous chondrites and some hydrated and oxidized asteroids", Asteroids, Comets, and Meteors, 500: 933–936, Bibcode:2002ESASP.500..933B.
- Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, vol. 185, no. 1, pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 27 March 2013.
External links
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На других языках
[de] (804) Hispania
(804) Hispania ist ein Asteroid des Hauptgürtels, der am 20. März 1915 vom katalanischen Astronomen José Comas Solá in Barcelona entdeckt wurde.
- [en] 804 Hispania
[es] (804) Hispania
(804) Hispania es un asteroide que forma parte del cinturón de asteroides y fue descubierto por José Comas y Soládirector del “Observatorio Fabra” el 20 de marzo de 1915 desde el observatorio de su casa “Villa Urania” de Barcelona, España.
[ru] (804) Испания
(804) Испания (исп. Hispania) — очень крупный астероид главного пояса, который был открыт 20 марта 1915 года испанским астрономом Хосе Комасом в обсерватории Фабра, недалеко от Барселоны и назван в честь родной страны первооткрывателя — Испании и стал первым астероидом, открытым представителем этой страны[1].
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