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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472385563150071 3.1544e-08  
a 2.319329534436784 8.3739e-09 au
q 1.977834802167554 7.379e-08 au
i 9.052523961732765 3.5062e-06 deg
node 75.99644626146728 2.2688e-05 deg
peri 312.8387325876851 2.5562e-05 deg
M 215.3309593126213 1.198e-05 deg
tp 2459718.959951933320
(2022-May-19.45995193)
4.3724e-05 TDB
period 1290.155667094839
3.53
6.9871e-06
1.913e-08
d
yr
n .2790360955516669 1.5112e-09 deg/d
Q 2.660824266706014 9.6069e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1391  
   data-arc span      8212 days (22.48 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52534  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:46:42  

Additional Information
 Earth MOID = .995311 au 
 Jupiter MOID = 2.7769 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 15.05   n/a E2021B10  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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