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21938 (1999 VE81)
Classification: Main-belt Asteroid          SPK-ID: 2021938
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08911430998198243 2.5955e-08  
a 2.562304929065801 1.0509e-08 au
q 2.33396689334867 6.5147e-08 au
i 5.581378440132448 2.9489e-06 deg
node 108.0617457691975 3.5961e-05 deg
peri 200.5568293292622 4.1487e-05 deg
M 207.1813555014164 2.1407e-05 deg
tp 2460032.443433492643
(2023-Mar-28.94343349)
8.977e-05 TDB
period 1498.113249260455
4.10
9.2163e-06
2.523e-08
d
yr
n .2403022603115714 1.4783e-09 deg/d
Q 2.790642964782933 1.1445e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1834  
   data-arc span      10247 days (28.05 yr)  
   first obs. used      1993-03-17  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47833  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:38:08  

Additional Information
 Earth MOID = 1.31947 au 
 Jupiter MOID = 2.39651 au 
 T_jup = 3.422 
[ 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 14.52   n/a MPCxxxxx  
diameter diameter 3.177 km 0.588 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.366   0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21938 (1999 VE81)          Discovered 1999-Nov-04 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VE81 = 1993 FG15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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