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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08199500626305453 6.4207e-08  
a 2.68358912577437 1.5527e-08 au
q 2.463548218599036 1.7098e-07 au
i 12.9987452773357 5.2357e-06 deg
node 71.25249228372473 2.4722e-05 deg
peri 305.5398257535988 3.627e-05 deg
M 233.3294485336114 2.7948e-05 deg
tp 2459565.496324342020
(2021-Dec-16.99632434)
0.00012531 TDB
period 1605.729780193607
4.40
1.3936e-05
3.815e-08
d
yr
n .2241971248466189 1.9458e-09 deg/d
Q 2.903630032949705 1.68e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1109  
   data-arc span      7701 days (21.08 yr)  
   first obs. used      1998-05-22  
   last obs. used      2019-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58151  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:07:32  

Additional Information
 Earth MOID = 1.49199 au 
 Jupiter MOID = 2.51443 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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