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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2153169928963087 2.156e-08  
a 2.415819884568295 7.1605e-09 au
q 1.895652811643943 5.2317e-08 au
i 9.577690780163604 4.2252e-07 deg
node 75.17506050688364 5.7125e-06 deg
peri 290.7070769407139 5.4287e-06 deg
M 281.1319913036451 3.9645e-06 deg
tp 2459696.964819546617
(2022-Apr-27.46481955)
1.6253e-05 TDB
period 1371.498238953016
3.75
6.0977e-06
1.669e-08
d
yr
n .2624866658777624 1.167e-09 deg/d
Q 2.935986957492648 8.7023e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2242  
   data-arc span      11962 days (32.75 yr)  
   first obs. used      1988-11-08  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45421  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:39:07  

Additional Information
 Earth MOID = .919231 au 
 Jupiter MOID = 2.58249 au 
 T_jup = 3.466 
[ 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 14.03   n/a MPO636380  

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

Alternate Designations
 1988 VH2 = 1998 HS113 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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