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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08271487195917183 4.5757e-08  
a 3.076736934766636 2.8719e-08 au
q 2.822245033155359 1.3287e-07 au
i 11.19350213414599 5.5274e-06 deg
node 76.83845320012637 2.7833e-05 deg
peri 28.61009046262821 4.7207e-05 deg
M 118.4005823748435 3.9115e-05 deg
tp 2458352.186131102879
(2018-Aug-21.68613110)
0.00021171 TDB
period 1971.214905548916
5.40
2.76e-05
7.556e-08
d
yr
n .1826284891548912 2.557e-09 deg/d
Q 3.331228836377913 3.1094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      6794 days (18.60 yr)  
   first obs. used      2001-11-17  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:15:52  

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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