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173939 (2001 WH12)
Classification: Main-belt Asteroid          SPK-ID: 2173939
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08271486433776705 4.7905e-08  
a 3.076736938535176 2.9559e-08 au
q 2.822245060061242 1.4199e-07 au
i 11.19350226474228 5.5839e-06 deg
node 76.83845539180898 3.3301e-05 deg
peri 28.61007958352315 5.2964e-05 deg
M 118.4005894991951 4.1311e-05 deg
tp 2458352.186090901670
(2018-Aug-21.68609090)
0.00022459 TDB
period 1971.214909170578
5.40
2.8407e-05
7.777e-08
d
yr
n .1826284888193526 2.6319e-09 deg/d
Q 3.33122881700911 3.2004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      322  
   data-arc span      6735 days (18.44 yr)  
   first obs. used      2001-11-17  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:13  

Additional Information
 Earth MOID = 1.8445 au 
 Jupiter MOID = 1.87218 au 
 T_jup = 3.195 
[ 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 15.4   n/a MPO469865  

173939 (2001 WH12)          Discovered 2001-Nov-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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