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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08912269969593509 2.5993e-08  
a 2.562300747439887 1.0747e-08 au
q 2.333941587395132 6.5183e-08 au
i 5.581585979905264 2.9826e-06 deg
node 108.0628577374735 3.8083e-05 deg
peri 200.4817481169846 4.3994e-05 deg
M 160.1702973733649 2.2381e-05 deg
tp 2458533.964841012360
(2019-Feb-19.46484101)		 9.2942e-05 TDB
period 1498.109581929593
4.10		 9.4252e-06
2.58e-08		 d
yr
n .2403028485648649 1.5118e-09 deg/d
Q 2.790659907484642 1.1705e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      10172 days (27.85 yr)  
   first obs. used      1993-03-17  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:55:12  

Additional Information
 Earth MOID = 1.31798 au 
 Jupiter MOID = 2.3974 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 14.5   n/a MPO492980  
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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