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100658 (1997 WH20)
Classification: Main-belt Asteroid          SPK-ID: 2100658
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1530455114864467 5.3796e-08  
a 2.787837966278633 1.5761e-08 au
q 2.361171878788185 1.4822e-07 au
i 3.497197378239741 5.9213e-06 deg
node 204.9387753351233 6.9857e-05 deg
peri 355.5143148097707 7.1106e-05 deg
M 165.3272796924868 1.3827e-05 deg
tp 2458219.696523455130
(2018-Apr-11.19652345)
6.4112e-05 TDB
period 1700.198854532578
4.65
1.4418e-05
3.947e-08
d
yr
n .2117399379727097 1.7956e-09 deg/d
Q 3.214504053769082 1.8173e-08 au
  Orbit Determination Parameters
   # obs. used (total)      470  
   data-arc span      8004 days (21.91 yr)  
   first obs. used      1997-11-23  
   last obs. used      2019-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56269  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 11:55:16  

Additional Information
 Earth MOID = 1.35853 au 
 Jupiter MOID = 1.74548 au 
 T_jup = 3.310 
[ 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 15.7   n/a MPO436469  

100658 (1997 WH20)          Discovered 1997-Nov-25 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1997 WH20 = 1999 CD114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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