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52631 (1997 WC21)
Classification: Main-belt Asteroid          SPK-ID: 2052631
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3018423060935549 3.2769e-08  
a 2.657021962692844 9.8571e-09 au
q 1.855020326132413 8.6425e-08 au
i 5.090854393311268 5.1196e-06 deg
node 307.7075201747719 4.4268e-05 deg
peri 103.1062026970635 4.5231e-05 deg
M 60.28662540606735 8.2349e-06 deg
tp 2458735.583128875558
(2019-Sep-09.08312888)
3.5727e-05 TDB
period 1581.944137068931
4.33
8.8031e-06
2.41e-08
d
yr
n .2275680863592426 1.2664e-09 deg/d
Q 3.459023599253276 1.2832e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1116  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1997-10-25  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5225  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:32:04  

Additional Information
 Earth MOID = .873747 au 
 Jupiter MOID = 1.97621 au 
 T_jup = 3.315 
[ 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 14.4   n/a MPO302352  
diameter diameter 3.367 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.357   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52631 (1997 WC21)          Discovered 1997-Nov-20 by Sugie, A. at Dynic
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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