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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458241.5 (2018-May-03.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0492655172012973 5.4315e-08  
q 2.594292929337009 1.605e-07 au
tp 2457688.434644675944
(2016-Oct-26.93464468)
0.00026729 TDB
node 265.9886473585397 5.5984e-05 deg
peri 106.0553558019404 8.1197e-05 deg
i 5.314512117277164 5.2185e-06 deg
  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
 Jupiter MOID = 2.38346 au 
 T_jup = 3.346 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.950138838606953E-15 -8.620012350908013E-15 -4.801417067588315E-12 2.259979600024534E-14 -9.899694038281237E-13 -1.980931918493558E-15
q -8.620012350908013E-15 2.575986441135604E-14 1.473921688478043E-11 -6.658302262323357E-14 3.084159205924031E-12 6.774694024033914E-15
tp -4.801417067588315E-12 1.473921688478043E-11 7.144341173404322E-8 -9.70215578864635E-11 1.574364057410683E-8 1.34059612846767E-11
node 2.259979600024534E-14 -6.658302262323357E-14 -9.70215578864635E-11 3.134251165388519E-9 -3.141267490034568E-9 7.557267420436246E-11
peri -9.899694038281237E-13 3.084159205924031E-12 1.574364057410683E-8 -3.141267490034568E-9 6.592915111135235E-9 -7.230540447964893E-11
i -1.980931918493558E-15 6.774694024033914E-15 1.34059612846767E-11 7.557267420436246E-11 -7.230540447964893E-11 2.723258435348981E-11

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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