804 Hispania
| Discovery | |
|---|---|
| Discovered by | J. Comas Solá |
| Discovery date | 20 March 1915 |
| Designations | |
Named after | Spain |
| 1915 WT | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.57 yr (39655 d) |
| Aphelion | 3.2343 AU (483.84 Gm) |
| Perihelion | 2.4418 AU (365.29 Gm) |
| 2.8381 AU (424.57 Gm) | |
| Eccentricity | 0.13961 |
| 4.78 yr (1746.3 d) | |
Average orbital speed | 17.60 km/s |
| 277.552° | |
| 0° 12m 22.104s / day | |
| Inclination | 15.395° |
| 347.611° | |
| 344.626° | |
| Earth MOID | 1.43481 AU (214.645 Gm) |
| Jupiter MOID | 2.16034 AU (323.182 Gm) |
| Jupiter Tisserand parameter | 3.244 |
| Physical characteristics | |
| Dimensions | 157.30 km |
Mean radius |
78.79±2.9 km[1] 74.125 ± 2.04 km[2] |
| Mass |
(5.00 ± 1.78) × 1018 kg[2] 9.95×1018 |
Mean density |
2.93 ± 1.06 g/cm3[2] 4.90 g/cm³ |
Equatorial surface gravity | ~0.107m/s2 |
Equatorial escape velocity | ~129.9m/s |
|
14.845 h (0.6185 d)[1] 7.405 hr[3] | |
| 0.0520±0.004 | |
| Temperature | ~167.4K |
| P | |
| 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.
This is a C-type carbonaceous asteroid. Measurements made with adaptive optics at the W. M. Keck Observatory put the size of this object at 122 km. 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.[4]
References
- 1 2 3 "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - ↑
- ↑ Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, 185 (1), pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 2013-03-27.
External links
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