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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457142.5 (2015-Apr-30.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2142882456683452 2.1672e-08  
q 1.89853868979154 5.2565e-08 au
tp 2456950.553251985547
(2014-Oct-20.05325199)
8.4063e-06 TDB
node 75.34065034033178 5.717e-06 deg
peri 290.0804787092511 5.4372e-06 deg
i 9.571336283624627 4.2155e-07 deg
  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
 Jupiter MOID = 2.58249 au 
 T_jup = 3.466 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.696960199935639E-16 -1.132541033621581E-15 -1.40847808679776E-13 -6.810198357412464E-15 -4.879325622120091E-14 1.032733030024915E-15
q -1.132541033621581E-15 2.763084333950047E-15 3.504085906758135E-13 1.605536180733121E-14 1.223228173104344E-13 -2.430258446360795E-15
tp -1.40847808679776E-13 3.504085906758135E-13 7.066513916444591E-11 1.575587880710533E-11 1.059893356338821E-11 -1.605101827678941E-12
node -6.810198357412464E-15 1.605536180733121E-14 1.575587880710533E-11 3.268387808600106E-11 -2.597076304713133E-11 -7.873554534933089E-13
peri -4.879325622120091E-14 1.223228173104344E-13 1.059893356338821E-11 -2.597076304713133E-11 2.956293491046777E-11 6.846494675486588E-14
i 1.032733030024915E-15 -2.430258446360795E-15 -1.605101827678941E-12 -7.873554534933089E-13 6.846494675486588E-14 1.777021785349823E-13

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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