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JPL Small-Body Database Browser
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39178 (2000 WK157)
Classification: Main-belt Asteroid          SPK-ID: 2039178
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08215417185643872 6.4526e-08  
a 2.682976717166627 1.6091e-08 au
q 2.462558986857696 1.7152e-07 au
i 12.99988359587889 5.2847e-06 deg
node 71.25124236768869 2.499e-05 deg
peri 305.7950703687531 3.665e-05 deg
M 143.3420449892583 2.8168e-05 deg
tp 2457961.361648794347
(2017-Jul-26.86164879)
0.00012529 TDB
period 1605.1801580707
4.39
1.444e-05
3.953e-08
d
yr
n .2242738911205404 2.0176e-09 deg/d
Q 2.903394447475558 1.7413e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1071  
   data-arc span      7654 days (20.96 yr)  
   first obs. used      1998-05-22  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56138  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:07:08  

Additional Information
 Earth MOID = 1.49023 au 
 Jupiter MOID = 2.51575 au 
 T_jup = 3.334 
[ 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 14.1   n/a MPO436044  
diameter diameter 4.938 km 0.428 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.219   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39178 (2000 WK157)          Discovered 2000-Nov-30 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 WK157 = 1998 KR4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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