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390188 (2012 WD20)
Classification: Main-belt Asteroid          SPK-ID: 2390188
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04782498428927728 5.4662e-08  
a 2.731748505275597 2.7745e-08 au
q 2.601102675928535 1.6162e-07 au
i 5.312814429634336 5.2191e-06 deg
node 265.979657758299 5.5988e-05 deg
peri 105.0123426812443 8.2194e-05 deg
M 287.7948947873777 6.0951e-05 deg
tp 2459331.269077800827
(2021-Apr-26.76907780)
0.00028081 TDB
period 1649.147489746774
4.52
2.5124e-05
6.879e-08
d
yr
n .2182946050842778 3.3256e-09 deg/d
Q 2.862394334622659 2.9072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6164 days (16.88 yr)  
   first obs. used      2003-12-01  
   last obs. used      2020-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:43:04  

Additional Information
 Earth MOID = 1.60708 au 
 Jupiter MOID = 2.38346 au 
 T_jup = 3.346 
[ 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 MPO476836  

390188 (2012 WD20)          Discovered 2007-Sep-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-03-21

[ show close-approach data ]
Alternate Designations
 2012 WD20 = 2007 RO51 = 2011 OL14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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