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804 Hispania (A915 FK)
Classification: Main-belt Asteroid          SPK-ID: 2000804
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1407821164080651 2.0149e-08  
a 2.837171584533396 9.0226e-09 au
q 2.437748564249961 6.067e-08 au
i 15.39850456502382 6.2437e-07 deg
node 347.5871492288417 1.9895e-06 deg
peri 344.7221256335334 1.0778e-05 deg
M 247.2468332033611 1.3862e-05 deg
tp 2459747.205038973041
(2022-Jun-16.70503897)
6.8554e-05 TDB
period 1745.528038119471
4.78
8.3265e-06
2.28e-08
d
yr
n .2062413161737824 9.8381e-10 deg/d
Q 3.236594604816831 1.0293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2903  
   data-arc span      41453 days (113.49 yr)  
   first obs. used      1907-09-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4406  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:53:53  

Additional Information
 Earth MOID = 1.42963 au 
 Jupiter MOID = 2.16932 au 
 T_jup = 3.244 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.93   n/a MPCxxxxx IRAS observations used: 16
magnitude slope G 0.18   n/a PDS3 (MPC 17260) Fit
diameter diameter 137.952 km 1.964 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 14.845 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pray, D. (2004) Minor Planet Bull. 31, 34-36.]
[Stephens, R.D. (2004) Minor Planet Bull. 31, 40-41.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D. (2014) Minor Planet Bull. 41, 92-95.]
geometric albedo albedo 0.054   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.727   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg.
U-B UB 0.390   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg.
Tholen spectral type spec_T PC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

804 Hispania (A915 FK)          Discovered 1915-Mar-20 by Comas Sola, J. at Barcelona
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A915 FK = 1953 FU1 = A903 WA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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