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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3019459263353477 3.2473e-08  
a 2.656631856607684 9.6687e-09 au
q 1.854472689732283 8.5432e-08 au
i 5.090876579730602 5.0144e-06 deg
node 307.7075799636665 4.2987e-05 deg
peri 103.0758225251524 4.3918e-05 deg
M 105.8276096279839 8.1168e-06 deg
tp 2458735.565282504990
(2019-Sep-09.06528251)
3.485e-05 TDB
period 1581.595756405939
4.33
8.6343e-06
2.364e-08
d
yr
n .2276182131507951 1.2426e-09 deg/d
Q 3.458791023483086 1.2588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1208  
   data-arc span      8510 days (23.30 yr)  
   first obs. used      1997-10-25  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51765  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:46:38  

Additional Information
 Earth MOID = .872395 au 
 Jupiter MOID = 1.97751 au 
 T_jup = 3.316 
[ 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 14.41   n/a E2021B10  
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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