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JPL Small-Body Database Browser
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21906 (1999 VH20)
Classification: Main-belt Asteroid          SPK-ID: 2021906
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1841117505147534 3.8976e-08  
a 2.655454022907632 1.199e-08 au
q 2.166553734338664 1.052e-07 au
i 10.76793018257225 4.5929e-06 deg
node 288.1609608864479 2.1896e-05 deg
peri 83.68111683460157 2.5155e-05 deg
M 189.7211836901873 1.3279e-05 deg
tp 2459348.092142570168
(2021-May-13.59214257)		 6.0641e-05 TDB
period 1580.544058020627
4.33		 1.0705e-05
2.931e-08		 d
yr
n .2277696709390316 1.5426e-09 deg/d
Q 3.144354311476599 1.4197e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1372  
   data-arc span      15685 days (42.94 yr)  
   first obs. used      1976-05-31  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50386  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:03:20  

Additional Information
 Earth MOID = 1.19712 au 
 Jupiter MOID = 2.46316 au 
 T_jup = 3.339 
[ 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 14.0   n/a MPO384942  
diameter diameter 5.204 km 0.407 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.197   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21906 (1999 VH20)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VH20 = 1990 RR10 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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