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78212 (2002 OB1)
Classification: Main-belt Asteroid          SPK-ID: 2078212
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07501417260000889 4.3662e-08  
a 3.028833046068328 1.9535e-08 au
q 2.801627641173948 1.321e-07 au
i 9.733083348967565 4.53e-06 deg
node 226.1813884176088 2.7344e-05 deg
peri 145.4768897534288 4.1514e-05 deg
M 80.40208645653885 3.0131e-05 deg
tp 2458570.492284980672
(2019-Mar-27.99228498)
0.00016102 TDB
period 1925.357714325441
5.27
1.8627e-05
5.1e-08
d
yr
n .186978241664629 1.8089e-09 deg/d
Q 3.256038450962708 2.1001e-08 au
  Orbit Determination Parameters
   # obs. used (total)      825  
   data-arc span      8971 days (24.56 yr)  
   first obs. used      1996-04-25  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53862  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:15  

Additional Information
 Earth MOID = 1.80929 au 
 Jupiter MOID = 2.15612 au 
 T_jup = 3.218 
[ 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 14.7   n/a MPO453202  
diameter diameter 4.333 km 1.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.746 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.136   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78212 (2002 OB1)          Discovered 2002-Jul-17 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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