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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1824920770580219 3.8157e-08  
a 2.656349574370455 1.188e-08 au
q 2.171586823151398 1.0335e-07 au
i 10.76655631374717 4.3099e-06 deg
node 288.1412523642982 2.13e-05 deg
peri 83.41577342452149 2.4357e-05 deg
M 11.090113954644 1.3565e-05 deg
tp 2459347.785328767723
(2021-May-13.28532877)
5.9414e-05 TDB
period 1581.343682791999
4.33
1.0609e-05
2.905e-08
d
yr
n .2276544965635737 1.5273e-09 deg/d
Q 3.141112325589511 1.4048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1498  
   data-arc span      16471 days (45.10 yr)  
   first obs. used      1976-05-31  
   last obs. used      2021-07-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:03:30  

Additional Information
 Earth MOID = 1.20197 au 
 Jupiter MOID = 2.46888 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 14.02   n/a E2021B10  
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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