| 词条 | 804 Hispania |
| 释义 |
| minorplanet=yes | background=#D6D6D6 | name=804 Hispania | discoverer=J. Comas Solá | discovered=20 March 1915 | mpc_name=(804) Hispania | alt_names=1915 WT | named_after=Spain | mp_category=Main belt | epoch=31 July 2016 (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 yr (1746.3 d) | inclination=15.395° | asc_node=347.611° | arg_peri=344.626° | mean_anomaly=277.552° | avg_speed=17.60 km/s | surface_grav=~0.107m/s2 | escape_velocity=~129.9m/s | rotation={{Convert|14.845|h|d|abbr=on|lk=on}}[1] 7.405 hr[1] | spectral_type=P | abs_magnitude=7.84 | albedo={{val|0.0520|0.004}} | single_temperature=~167.4K | dimensions=157.30 km{{Citation needed|date=May 2016}} | mean_radius={{val|78.79|2.9}} km[1] 74.125 ± 2.04 km[4] | mass={{nowrap|(5.00 ± 1.78) × 1018 kg[4]}} 9.95×1018{{Citation needed|date=May 2016}} | density=2.93 ± 1.06 g/cm3[4] 4.90 g/cm³{{Citation needed|date=May 2016}} | mean_motion={{Deg2DMS|0.20614|sup=ms}} / day | orbit_ref=[2] | observation_arc=108.57 yr (39655 d) | 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 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.References1. ^ {{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }} [3]2. ^1 2 {{Cite web |url=http://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}} 3. ^1 2 3 {{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. }} External links
7 : Background asteroids|Discoveries by Josep Comas Solà|Minor planets named for places|Named minor planets|PC-type asteroids (Tholen)|C-type asteroids (SMASS)|Astronomical objects discovered in 1915 |
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