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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2192260425379005 4.8791e-08  
a 3.069378177013446 2.8574e-08 au
q 2.396490546214593 1.4841e-07 au
i .8992759046180012 6.0338e-06 deg
node 170.7642927211707 0.00042148 deg
peri 204.6173691249767 0.00042185 deg
M 270.4451684226551 1.9723e-05 deg
tp 2459489.107972599939
(2021-Oct-01.60797260)
0.00011256 TDB
period 1964.147182657155
5.38
2.7427e-05
7.509e-08
d
yr
n .1832856535287654 2.5594e-09 deg/d
Q 3.742265807812299 3.4838e-08 au
  Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      7202 days (19.72 yr)  
   first obs. used      1999-07-20  
   last obs. used      2019-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57054  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:37:24  

Additional Information
 Earth MOID = 1.39775 au 
 Jupiter MOID = 1.72186 au 
 T_jup = 3.194 
[ 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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