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21020 (1988 VH2)
Classification: Main-belt Asteroid          SPK-ID: 2021020
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .215231295991119 2.2583e-08  
a 2.415650181130586 7.3856e-09 au
q 1.895726661984669 5.4372e-08 au
i 9.577889345316175 4.248e-07 deg
node 75.1752273837174 5.7404e-06 deg
peri 290.732724336805 5.461e-06 deg
M 229.6411311049694 3.7766e-06 deg
tp 2459697.078112929078
(2022-Apr-27.57811293)
1.6291e-05 TDB
period 1371.353726599287
3.75
6.2892e-06
1.722e-08
d
yr
n .2625143265499674 1.2039e-09 deg/d
Q 2.935573700276504 8.9752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2113  
   data-arc span      11789 days (32.28 yr)  
   first obs. used      1988-11-08  
   last obs. used      2021-02-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4643  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:50:56  

Additional Information
 Earth MOID = .918637 au 
 Jupiter MOID = 2.58213 au 
 T_jup = 3.466 
[ 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 14.01   n/a E2021B10  

21020 (1988 VH2)          Discovered 1988-Nov-08 by Hioki, T., Kawasato, N. at Okutama
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 VH2 = 1998 HS113 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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