804 Hispania

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804 Hispania
Discovery
Discovered by J. Comas Solá
Discovery date 20 March 1915
Designations
MPC designation (804) Hispania
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)
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[citation needed]
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[citation needed]
Mean density
2.93 ± 1.06 g/cm3[2]
4.90 g/cm³[citation needed]
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[edit]

  1. ^ a b c "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, Bibcode:2012P&SS...73...98C, arXiv:1203.4336Freely accessible, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ [1]
  4. ^ 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, PMC 2600456Freely accessible, PMID 19081813, doi:10.1016/j.icarus.2006.06.001, retrieved 2013-03-27. 

External links[edit]