View source for 804 Hispania

{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet=yes
| background=#D6D6D6
| name=804 Hispania
| discoverer=[[Josep Comas i Solá|J. Comas Solá]]
| discovered=20 March 1915
| mpc_name=(804) Hispania
| pronounced={{IPAc-en|h|ɪ|ˈ|s|p|eɪ|n|i|ə}}<ref name=Webster1884/><ref name=OED>{{OED|Hispanian}}</ref>
| adjective=Hispanian<ref name=OED/>
| alt_names=1915 WT
| named_after=[[Spain]]
| mp_category=[[Asteroid belt|Main belt]]
| epoch=31 July 2016 ([[Julian day|JD]] 2457600.5)
| semimajor={{Convert|2.8381|AU|Gm|abbr=on}}
| perihelion={{Convert|2.4418|AU|Gm|abbr=on}}
| aphelion={{Convert|3.2343|AU|Gm|abbr=on|lk=on}}
| eccentricity=0.13961
| period=4.78 [[Julian year (astronomy)|yr]] (1746.3 [[Julian year (astronomy)|d]])
| inclination=15.395°
| asc_node=347.611°
| arg_peri=344.626°
| mean_anomaly=277.552[[Degree (angle)|°]]
| avg_speed=17.60 km/s
| surface_grav=~0.107m/s<sup>2</sup>
| escape_velocity=~129.9m/s
| rotation={{Convert|14.845|h|d|abbr=on|lk=on}}<ref name="jpldata"/><br />{{val|7.405|0.010|u=hours}}<ref name=Calabresi_Roselli_2001/>
| spectral_type=[[P-type asteroid|P]]
| abs_magnitude=7.84
| albedo={{val|0.0520|0.004}}
| single_temperature=~167.4[[Kelvin|K]]
| dimensions=157.30 km{{Citation needed|date=May 2016}}
| mean_radius={{val|78.79|2.9|ul=km}}<ref name="jpldata"/><br />{{val|74.125|2.04|u=km}}<ref name="Carry2012"/>
| mass={{val|5.00|1.78|e=18|u=kg}}<ref name="Carry2012"/>
| density={{val|2.93|1.06|u=g/cm<sup>3</sup>}}<ref name="Carry2012"/>
| mean_motion={{Deg2DMS|0.20614|sup=ms}} / day
| orbit_ref=<ref name="jpldata"/>
| observation_arc={{convert|39655|days|years|abbr=on}}
| uncertainty=0
| moid={{Convert|1.43481|AU|Gm|abbr=on}}
| jupiter_moid={{Convert|2.16034|AU|Gm|abbr=on}}
| tisserand=3.244
}}
'''804 Hispania''' is a [[minor planet]] orbiting the [[Sun]]. It was discovered from [[Barcelona]] ([[Spain]]) on 20 March 1915 by [[Josep Comas i Solà|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.<ref name=Busarev_Taran_2002/> 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.<ref name="Marchis2006"/> 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.<ref name="Carry2012"/>
== References ==
{{Reflist|refs=
<ref name=Webster1884>{{citation
| first=Noah | last=Webster | date=1884
| title=A Practical Dictionary of the English Language }}</ref>
<ref name="Marchis2006">{{Citation
| first1    = F.
| last1     = Marchis
| first2    = M.
| last2     = Kaasalainen
| first3    = E. F. Y.
| last3     = Hom
| first4    = J.
| last4     = Berthier
| first5    = J.
| last5     = Enriquez
| first6    = D.
| last6     = Hestroffer
| first7    = D.
| last7     = Le Mignant
| first8    = I.
| last8     = de Pater
| display-authors = 1
| title     = Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey
| work      = Icarus
| volume    = 185
| issue     = 1
| pages     = 39–63
| date=November 2006
| access-date= 2013-03-27
| url       = http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006Icar..185...39M&link_type=EJOURNAL&db_key=AST&high=
| bibcode   = 2006Icar..185...39M
| doi       = 10.1016/j.icarus.2006.06.001
| postscript= .
| pmid=19081813
| pmc=2600456}}</ref>
<ref name="Carry2012">{{Citation
| first1    = B.
| last1     = Carry
| title     = Density of asteroids
| work      = Planetary and Space Science
| volume    = 73
| pages      = 98–118
|date=December 2012
| doi       = 10.1016/j.pss.2012.03.009
| bibcode   = 2012P&SS...73...98C
| postscript= .
|arxiv = 1203.4336 }} See Table 1.</ref>
<ref name="jpldata">{{Cite web
| url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=804;cad=1
| title=804 Hispania (1915 WT)
| work=[[JPL Small-Body Database]]
| publisher=[[NASA]]/[[Jet Propulsion Laboratory]]
| access-date=4 May 2016 }}</ref>
<ref name=Calabresi_Roselli_2001>{{citation
| title=The rotation period of 804 Hispania: Some considerations on its nature
| last1=Calabresi | first1=M. | last2=Roselli | first2=G.
| journal=Astronomy and Astrophysics | postscript=.
| volume=369 | pages=305–307 | date=April 2001
| doi=10.1051/0004-6361:20010114 | bibcode=2001A&A...369..305C | doi-access=free }}</ref>
<ref name=Busarev_Taran_2002>{{citation
| last1=Busarev | first1=V. V. | last2=Taran | first2=M. N.
| title=On the spectral similarity of carbonaceous chondrites and some hydrated and oxidized asteroids
| journal=Asteroids, Comets, and Meteors
| volume=500 | pages=933–936  | date=November 2002
| bibcode=2002ESASP.500..933B | postscript=. }}</ref>
}} <!-- end of reflist -->
== External links ==
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|804}}
* {{JPL small body}}
{{Minor planets navigator |803 Picka |number=804 |805 Hormuthia}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Hispania}}
[[Category:Background asteroids|000804]]
[[Category:Discoveries by Josep Comas Solà]]
[[Category:Named minor planets]]
[[Category:PC-type asteroids (Tholen)|000804]]
[[Category:C-type asteroids (SMASS)|000804]]
[[Category:Astronomical objects discovered in 1915|19150320]]
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