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39806 (1997 WX2)
Classification: Main-belt Asteroid          SPK-ID: 2039806
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03170904441900552 3.7799e-08  
a 2.228981323798154 8.5942e-09 au
q 2.158302455992704 8.1451e-08 au
i 5.290177345267395 3.5867e-06 deg
node 56.98463921664604 4.0611e-05 deg
peri 43.32926672157006 7.3682e-05 deg
M 249.8334603682743 6.1847e-05 deg
tp 2459372.467742404508
(2021-Jun-06.96774240)
0.00020928 TDB
period 1215.508699041139
3.33
7.0299e-06
1.925e-08
d
yr
n .2961722941876006 1.7129e-09 deg/d
Q 2.299660191603603 8.8667e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      7918 days (21.68 yr)  
   first obs. used      1997-11-23  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5421  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:35:50  

Additional Information
 Earth MOID = 1.17819 au 
 Jupiter MOID = 2.72654 au 
 T_jup = 3.637 
[ 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 15.6   n/a MPO474255  
diameter diameter 1.956 km 0.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.296 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.350   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39806 (1997 WX2)          Discovered 1997-Nov-23 by Kobayashi, T. at Oizumi
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WX2 = 1999 JG75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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