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39138 (2000 WU68)
Classification: Main-belt Asteroid          SPK-ID: 2039138
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398383489708761 6.0135e-08  
a 2.646903341467206 1.3976e-08 au
q 2.276764748310937 1.6049e-07 au
i 11.89513751819744 4.8391e-06 deg
node 284.5658546591964 2.5762e-05 deg
peri 239.7620599613883 3.0191e-05 deg
M 81.19241952744756 1.5445e-05 deg
tp 2458645.753162132229
(2019-Jun-11.25316213)
6.6806e-05 TDB
period 1572.91607240778
4.31
1.2458e-05
3.411e-08
d
yr
n .2288742586557216 1.8128e-09 deg/d
Q 3.017041934623475 1.5931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      13875 days (37.99 yr)  
   first obs. used      1981-05-28  
   last obs. used      2019-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:06:29  

Additional Information
 Earth MOID = 1.31196 au 
 Jupiter MOID = 2.1088 au 
 T_jup = 3.348 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO385065  
diameter diameter 4.442 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.462 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 0.225   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39138 (2000 WU68)          Discovered 2000-Nov-19 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 WU68 = 1981 KT = 1992 YG4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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