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102631 (1999 VR31)
Classification: Main-belt Asteroid          SPK-ID: 2102631
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07979803357067952 6.191e-08  
a 2.762827532928606 2.004e-08 au
q 2.542359328705971 1.6518e-07 au
i 8.405160437472103 6.8073e-06 deg
node 235.1071944436499 2.9583e-05 deg
peri 316.0709335278792 4.4852e-05 deg
M 82.17148418024023 3.1897e-05 deg
tp 2458817.633189536705
(2019-Nov-30.13318954)		 0.00014888 TDB
period 1677.370843934818
4.59		 1.825e-05
4.997e-08		 d
yr
n .2146215914636402 2.3351e-09 deg/d
Q 2.983295737151241 2.1639e-08 au
   Orbit Determination Parameters
   # obs. used (total)      509  
   data-arc span      7614 days (20.85 yr)  
   first obs. used      1999-11-03  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:53:34  

Additional Information
 Earth MOID = 1.54747 au 
 Jupiter MOID = 2.01639 au 
 T_jup = 3.320 
[ 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 15.31   n/a E2021B55  
diameter diameter 2.672 km 0.675 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.206   0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102631 (1999 VR31)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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