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JPL Small-Body Database Browser
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76 Freia
Classification: Outer Main-belt Asteroid          SPK-ID: 2000076
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658287383949388 3.1452e-08  
a 3.41268048485399 1.058e-08 au
q 2.846759985505625 1.0871e-07 au
i 2.121739533883599 3.5215e-06 deg
node 204.3038911826314 0.00010146 deg
peri 252.4037703481975 0.00010206 deg
M 284.1182817138235 1.21e-05 deg
tp 2459085.874019447924
7.871e-05 TDB
period 2302.723909628233
n .156336588374644 7.2704e-10 deg/d
Q 3.978600984202356 1.2335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3266  
   data-arc span      56855 days (155.66 yr)  
   first obs. used      1864-04-06  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47336  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:36:24  

Additional Information
 Earth MOID = 1.86461 au 
 Jupiter MOID = 1.21882 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] (  
rotation period rot_per 9.973 h n/a LCDB (Rev. 2019-January); 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,]
[Behrend, R. (2014) Observatoire de Geneve web site,]
[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] (  
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          Discovered 1862-Oct-21 by D'Arrest, H. at Copenhagen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A911 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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