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76 Freia (A862 UA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000076
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1660108530176057 3.1063e-08  
a 3.414264879297381 1.0421e-08 au
q 2.847459854257171 1.077e-07 au
i 2.121333842262989 3.5022e-06 deg
node 204.3009574963765 9.9536e-05 deg
peri 252.2670098462308 0.00010014 deg
M 346.7613476284375 1.1991e-05 deg
tp 2459085.239426519234
(2020-Aug-23.73942652)
7.6978e-05 TDB
period 2304.327713329302
6.31
1.055e-05
2.888e-08
d
yr
n .156227778678177 7.1528e-10 deg/d
Q 3.981069904337592 1.2151e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3498  
   data-arc span      56917 days (155.83 yr)  
   first obs. used      1864-04-06  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45949  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:16:41  

Additional Information
 Earth MOID = 1.86521 au 
 Jupiter MOID = 1.21617 au 
 T_jup = 3.121 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.0   n/a MPO502153 IRAS observations used: 15
diameter diameter 145.423 km 1.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.973 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Lagerkvist, C.-I.; Hahn, G.; Magnusson, P.; Rickman, H.; Hammarback, G. (1986) in Asteroids, Comets, Meteors II. C.-I. Lagerkvist, B.A. Lindblad, M. Lundstedt, H. Rickman, Uppsala, eds. pp. 67-72.]
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Armstrong, J.C.; Nellermoe, B.L.; Reitzler, L.E. (1996) I.A.P.P.P. Comm. 63, 59-68.]
[Kryszczynska, A.; Colas, F.; Berthier, J.; Michalowski, T.; Pych, W. (1996) Icarus 124, 134-140.]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, N.M.; Krugly, Yu.N.; et al. (2005) Abstr. IAU Symp. 229, p. 133.]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, M.; Krugly, Y.N.; et al. (2008) Icarus 196, 601-611.]
[Stephens, R.D.; Warner, B.D. (2008) Minor Planet Bull. 35, 84-85.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.058   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.704   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=.55, mean=10.43, max.=16.49) deg.
U-B UB 0.298   0.047 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=.55, mean=11.26, max.=20.23) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

76 Freia (A862 UA)          Discovered 1862-Oct-21 by D'Arrest, H. at Copenhagen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A862 UA = A911 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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