Discovery | |
---|---|
Discovered by | J. Comas Solá |
Discovery date | 20 March 1915 |
Designations | |
(804) Hispania | |
Pronunciation | /hɪˈspeɪniə/[1][2] |
Named after | Spain |
1915 WT | |
Minor planet category | Main belt |
Adjectives | Hispanian[2] |
Orbital characteristics[3] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 39,655 d (108.57 yr) |
|{{{apsis}}}|helion}} | 3.2343 astronomical unit|AU (483.84 Gm) |
|{{{apsis}}}|helion}} | 2.4418 AU (365.29 Gm) |
2.8381 AU (424.57 Gm) | |
Eccentricity | 0.13961 |
Orbital period | 4.78 yr (1746.3 d) |
Average Orbital speed | 17.60 km/s |
Mean anomaly | 277.552° |
Mean motion | 0° 12m 22.104s / day |
Inclination | 15.395° |
Longitude of ascending node | 347.611° |
344.626° | |
Earth MOID | 1.43481 AU (214.645 Gm) |
Jupiter MOID | 2.16034 AU (323.182 Gm) |
TJupiter | 3.244 |
Physical characteristics | |
Dimensions | 157.30 km[citation needed] |
Mean radius | 78.79±2.9 km[3] 74.125±2.04 km[4] |
Mass | (5.00±1.78)×1018 kg[4] |
Mean density | 2.93±1.06 g/cm3[4] |
Equatorial surface gravity | ~0.107m/s2 |
Equatorial escape velocity | ~129.9m/s |
Rotation period | 14.845 h (0.6185 d)[3] 7.405±0.010 h[5] |
Geometric albedo | 0.0520±0.004 |
Physics | ~167.4K |
P | |
Absolute magnitude (H) | 7.84 |
804 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.
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]
![]() | Original source: https://en.wikipedia.org/wiki/804 Hispania.
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