804 Hispania

804 Hispania
Discovery
Discovered by	J. Comas Solá
Discovery date	20 March 1915
Designations
MPC designation	(804) Hispania
Pronunciation	/hɪˈspeɪniə/
Named after	Spain
Alternative designations	1915 WT
Minor planet category	Main belt
Adjectives	Hispanian
Orbital characteristics
	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)
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°
\|{{{apsis}}}\|helion}}	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; 74.125±2.04 km
Mass	(5.00±1.78)×1018 kg
Mean density	2.93±1.06 g/cm3
Equatorial surface gravity	~0.107m/s2
Equatorial escape velocity	~129.9m/s
Rotation period	14.845 h (0.6185 d); 7.405±0.010 h
Geometric albedo	0.0520±0.004
Physics	~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. 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
↑ ^2.0 ^2.1 Hispanian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Hispanian (Subscription or UK public library membership required.)
↑ ^3.0 ^3.1 ^3.2 "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=804;cad=1.
↑ ^4.0 ^4.1 ^4.2 ^4.3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. 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, doi:10.1051/0004-6361:20010114, Bibcode: 2001A&A...369..305C.
↑ 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 185 (1): pp. 39–63, doi:10.1016/j.icarus.2006.06.001, PMID 19081813, PMC 2600456, Bibcode: 2006Icar..185...39M, http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006Icar..185...39M&link_type=EJOURNAL&db_key=AST&high=, retrieved 2013-03-27.

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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Original source: https://en.wikipedia.org/wiki/804 Hispania. Read more

[Webster1884-1] Webster, Noah (1884), A Practical Dictionary of the English Language

[OED-2] 2.0 ^2.1 Hispanian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Hispanian (Subscription or UK public library membership required.)

[jpldata-3] 3.0 ^3.1 ^3.2 "804 Hispania (1915 WT)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=804;cad=1.

[Carry2012-4] 4.0 ^4.1 ^4.2 ^4.3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.

[Calabresi_Roselli_2001-5] Calabresi, M.; Roselli, G. (April 2001), "The rotation period of 804 Hispania: Some considerations on its nature", Astronomy and Astrophysics 369: 305–307, doi:10.1051/0004-6361:20010114, Bibcode: 2001A&A...369..305C.

[Busarev_Taran_2002-6] 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.

[Marchis2006-7] 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, doi:10.1016/j.icarus.2006.06.001, PMID 19081813, PMC 2600456, Bibcode: 2006Icar..185...39M, http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006Icar..185...39M&link_type=EJOURNAL&db_key=AST&high=, retrieved 2013-03-27.

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804 Hispania

Topic: Astronomy

References

External links