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331055 (2009 WJ)
Classification: Main-belt Asteroid          SPK-ID: 2331055
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1339190095219537 5.6116e-08  
a 2.266649607003468 1.0961e-08 au
q 1.963102136700238 1.2369e-07 au
i 5.8718011577353 4.1061e-06 deg
node 248.2705253844995 5.2804e-05 deg
peri 109.0533321681752 5.6993e-05 deg
M 79.65406338865101 1.7494e-05 deg
tp 2458724.708774000926
(2019-Aug-29.20877400)
6.084e-05 TDB
period 1246.450427459454
3.41
9.0412e-06
2.475e-08
d
yr
n .2888201504601838 2.095e-09 deg/d
Q 2.570197077306697 1.2429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      234  
   data-arc span      8907 days (24.39 yr)  
   first obs. used      1995-08-31  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52305  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 20:56:45  

Additional Information
 Earth MOID = .968837 au 
 Jupiter MOID = 2.88174 au 
 T_jup = 3.597 
[ 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 17.3   n/a MPO446521  

331055 (2009 WJ)          Discovered 2009-Nov-16 by Mayhill at Mayhill
Reference: 20120604/Numbers.arcLast Updated: 2012-06-06

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