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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471615743845113 3.1558e-08  
a 2.319458228862963 8.5688e-09 au
q 1.978123104184379 7.3788e-08 au
i 9.052366786290992 3.5581e-06 deg
node 75.99781589006575 2.2994e-05 deg
peri 312.8726123948306 2.5967e-05 deg
M 159.4787830798688 1.2413e-05 deg
tp 2458428.917830202296
(2018-Nov-06.41783020)
4.3765e-05 TDB
period 1290.263050377816
3.53
7.15e-06
1.958e-08
d
yr
n .279012872525943 1.5461e-09 deg/d
Q 2.660793353541547 9.8298e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1384  
   data-arc span      8212 days (22.48 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52617  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:16:52  

Additional Information
 Earth MOID = .996689 au 
 Jupiter MOID = 2.77581 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456925.5 (2014-Sep-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463250798540914 3.1485e-08  
q 1.980745595366164 7.3572e-08 au
tp 2457136.397790253625
(2015-Apr-23.89779025)
4.3378e-05 TDB
node 76.08537531836862 2.3013e-05 deg
peri 312.4254914254948 2.6031e-05 deg
i 9.047510822467993 3.5559e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1384  
   data-arc span      8212 days (22.48 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52617  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:16:52  

Additional Information
 Jupiter MOID = 2.77581 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.912751354804497E-16 -2.304927540553095E-15 -4.961288989067519E-14 -7.802367872087978E-15 -1.398461226978387E-14 -1.244045907116324E-15
q -2.304927540553095E-15 5.412812487361671E-15 1.27937967349116E-13 1.860736790741347E-14 3.335466370386968E-14 3.051261616027846E-15
tp -4.961288989067519E-14 1.27937967349116E-13 1.881633022581756E-9 4.59078943089545E-13 5.39861132043607E-10 -1.101467801764498E-12
node -7.802367872087978E-15 1.860736790741347E-14 4.59078943089545E-13 5.296191105027801E-10 -5.225449685485166E-10 9.5187433828E-13
peri -1.398461226978387E-14 3.335466370386968E-14 5.39861132043607E-10 -5.225449685485166E-10 6.776238414789378E-10 -1.238173590210429E-12
i -1.244045907116324E-15 3.051261616027846E-15 -1.101467801764498E-12 9.5187433828E-13 -1.238173590210429E-12 1.264421221944464E-11

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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