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173940 (2001 WD39)
Classification: Main-belt Asteroid          SPK-ID: 2173940
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2325408726225241 3.8034e-08  
a 3.115676033019612 2.3949e-08 au
q 2.391154009492148 1.1219e-07 au
i 8.535630272443981 4.993e-06 deg
node 208.6597170953647 2.8201e-05 deg
peri 240.8473310733984 3.0245e-05 deg
M 123.8116050360262 1.3258e-05 deg
tp 2458309.646885124428
(2018-Jul-10.14688512)
6.9826e-05 TDB
period 2008.754520893565
5.50
2.316e-05
6.341e-08
d
yr
n .1792155269623783 2.0663e-09 deg/d
Q 3.840198056547078 2.9518e-08 au
  Orbit Determination Parameters
   # obs. used (total)      641  
   data-arc span      6817 days (18.66 yr)  
   first obs. used      2001-10-17  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53994  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 03:27:27  

Additional Information
 Earth MOID = 1.42125 au 
 Jupiter MOID = 1.51922 au 
 T_jup = 3.159 
[ 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 15.0   n/a MPO251411  

173940 (2001 WD39)          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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