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118931 (2000 WD21)
Classification: Main-belt Asteroid          SPK-ID: 2118931
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2186979178110567 4.8758e-08  
a 3.071596134437313 2.9634e-08 au
q 2.399844455479382 1.4812e-07 au
i .8999326408691626 5.8294e-06 deg
node 170.6537325408288 0.0003919 deg
peri 204.4890034567007 0.00039222 deg
M 307.2545251246479 1.9093e-05 deg
tp 2459488.589414768249
(2021-Oct-01.08941477)
0.00010747 TDB
period 1966.276530103518
5.38
2.8456e-05
7.791e-08
d
yr
n .1830871672872214 2.6496e-09 deg/d
Q 3.743347813395244 3.6115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      253  
   data-arc span      7231 days (19.80 yr)  
   first obs. used      1999-07-20  
   last obs. used      2019-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57758  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:59:33  

Additional Information
 Earth MOID = 1.39962 au 
 Jupiter MOID = 1.722 au 
 T_jup = 3.193 
[ 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 16.5   n/a MPO436572  

118931 (2000 WD21)          Discovered 2000-Nov-24 by Jeon, Y.-B., Lee, B.-C. at Bohyunsan
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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