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JPL Small-Body Database Browser
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52640 (1997 WJ46)
Classification: Main-belt Asteroid          SPK-ID: 2052640
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471615719771324 3.2212e-08  
a 2.31945823034915 9.0186e-09 au
q 1.978123111035672 7.5804e-08 au
i 9.052365175414637 3.8726e-06 deg
node 75.99781338086669 2.3134e-05 deg
peri 312.8726117205913 2.666e-05 deg
M 159.4787851252234 1.2887e-05 deg
tp 2458428.917822322254
(2018-Nov-06.41782232)
4.5788e-05 TDB
period 1290.263051617916
3.53
7.5253e-06
2.06e-08
d
yr
n .2790128722577777 1.6273e-09 deg/d
Q 2.660793349662629 1.0346e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      8076 days (22.11 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54522  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 08:20:40  

Additional Information
 Earth MOID = .996689 au 
 Jupiter MOID = 2.77581 au 
 T_jup = 3.548 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO412529  
diameter diameter 3.097 km 0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.410 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.221   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

52640 (1997 WJ46)          Discovered 1997-Nov-26 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WJ46 = 1999 GT43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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