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(2012 WJ4)
Classification: Mars-crossing Asteroid          SPK-ID: 3618490
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5871530470373141 8.2598e-07  
a 3.168095064558719 1.4632e-06 au
q 1.307938394099191 2.0913e-06 au
i 16.49525201006885 3.619e-05 deg
node 248.7763184397658 7.9702e-05 deg
peri 164.0496419076467 0.00028181 deg
M 151.992866750604 0.00040225 deg
tp 2458330.906189671368
(2018-Jul-31.40618967)
0.0017027 TDB
period 2059.660946009912
5.64
0.0014269
3.907e-06
d
yr
n .1747860494696526 1.2109e-07 deg/d
Q 5.028251735018248 2.3224e-06 au
  Orbit Determination Parameters
   # obs. used (total)      75  
   data-arc span      2250 days (6.16 yr)  
   first obs. used      2012-11-19  
   last obs. used      2019-01-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .38713  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 07:16:07  

Additional Information
 Earth MOID = .327376 au 
 Jupiter MOID = .493715 au 
 T_jup = 2.854 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.8   n/a MPO466413  

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