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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471615705826464 3.2169e-08  
a 2.319458230904757 8.9928e-09 au
q 1.978123114743966 7.5675e-08 au
i 9.052365069619295 3.8559e-06 deg
node 75.99781338189923 2.3134e-05 deg
peri 312.8726105809121 2.6627e-05 deg
M 159.4787858476891 1.2861e-05 deg
tp 2458428.917819527514
(2018-Nov-06.41781953)
4.5674e-05 TDB
period 1290.263052081523
3.53
7.5038e-06
2.054e-08
d
yr
n .279012872157525 1.6227e-09 deg/d
Q 2.660793347065547 1.0316e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1223  
   data-arc span      8104 days (22.19 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:32:06  

Additional Information
 Earth MOID = .996689 au 
 Jupiter MOID = 2.77581 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456740.5 (2014-Mar-24.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463954249019846 3.2071e-08  
q 1.980575270954678 7.5397e-08 au
tp 2457136.385251763002
(2015-Apr-23.88525176)
4.6058e-05 TDB
node 76.08731581541871 2.3151e-05 deg
peri 312.4284741944634 2.6696e-05 deg
i 9.048006256879523 3.8539e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1223  
   data-arc span      8104 days (22.19 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:32:06  

Additional Information
 Jupiter MOID = 2.77581 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.028537169302924E-15 -2.405621575802121E-15 4.489474532338852E-14 -9.382003414863991E-15 2.036015275899474E-14 -2.303344854121781E-15
q -2.405621575802121E-15 5.684637406840541E-15 -1.264358562807973E-13 2.242305193920871E-14 -5.86176578995826E-14 5.604687564970102E-15
tp 4.489474532338852E-14 -1.264358562807973E-13 2.121357664065697E-9 5.88310928458151E-13 6.229749006096845E-10 -1.086334037076297E-12
node -9.382003414863991E-15 2.242305193920871E-14 5.88310928458151E-13 5.359822426734798E-10 -5.28796177471999E-10 4.509770848792078E-12
peri 2.036015275899474E-14 -5.86176578995826E-14 6.229749006096845E-10 -5.28796177471999E-10 7.126579518192298E-10 -4.758419643337489E-12
i -2.303344854121781E-15 5.604687564970102E-15 -1.086334037076297E-12 4.509770848792078E-12 -4.758419643337489E-12 1.485226656637315E-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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