804 Hispania

804 Hispania
Discovery
Discovered by	J. Comas Solá
Discovery date	20 March 1915
Designations
MPC designation	(804) Hispania
Pronunciation	/hɪˈspeɪniə/[1][2]
Named after	Spain
Alternative designations	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	108.57 yr (39655 d)
Aphelion	3.2343 AU (483.84 Gm)
Perihelion	2.4418 AU (365.29 Gm)
Semi-major axis	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°
Argument of perihelion	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
Mean radius	78.79±2.9 km[3]; 74.125 ± 2.04 km[4]
Mass	(5.00 ± 1.78) × 1018 kg[4]; 9.95×1018
Mean density	2.93 ± 1.06 g/cm3[4]; 4.90 g/cm³
Equatorial surface gravity	~0.107m/s2
Equatorial escape velocity	~129.9m/s
Rotation period	14.845 h (0.6185 d)[3]; 7.405 hr[5]
Geometric albedo	0.0520±0.004
Temperature	~167.4K
Spectral type	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 and 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.[6]

References

Noah Webster (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, 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 27 March 2013.

External links

Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
804 Hispania at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
804 Hispania at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[1] Noah Webster (1884) A Practical Dictionary of the English Language

[OED-2] "Hispanian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

[jpldata-3] "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.

[Carry2012-4] 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.

[Marchis2006-6] 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 27 March 2013.