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129998 (1999 VA31)
Classification: Main-belt Asteroid          SPK-ID: 2129998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1523595072174489 6.4089e-08  
a 2.59385219665308 1.6649e-08 au
q 2.19865415417612 1.7276e-07 au
i 10.83651859605817 5.6723e-06 deg
node 239.3249966700425 3.4531e-05 deg
peri 103.0967506463287 3.9384e-05 deg
M 31.98710802571322 1.9911e-05 deg
tp 2458864.922150413910
(2020-Jan-16.42215041)
8.3922e-05 TDB
period 1525.865539696725
4.18
1.4691e-05
4.022e-08
d
yr
n .2359316667388348 2.2715e-09 deg/d
Q 2.98905023913004 1.9185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      7640 days (20.92 yr)  
   first obs. used      1999-10-22  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5053  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 20:29:58  

Additional Information
 Earth MOID = 1.22203 au 
 Jupiter MOID = 2.4916 au 
 T_jup = 3.377 
[ 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 15.1   n/a MPO493743  
diameter diameter 2.896 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.253   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129998 (1999 VA31)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 VA31 = 2002 JP59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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