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JPL Small-Body Database Browser
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39177 (2000 WJ157)
Classification: Main-belt Asteroid          SPK-ID: 2039177
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1566622851534175 5.669e-08  
a 2.325187984801955 8.8097e-09 au
q 1.960918721691611 1.348e-07 au
i 6.603271892705102 5.7249e-06 deg
node 350.9663491752523 2.6175e-05 deg
peri 354.5388689532144 2.7941e-05 deg
M 276.5301095041512 9.8047e-06 deg
tp 2459300.770643728093
(2021-Mar-27.27064373)
3.5608e-05 TDB
period 1295.047005572499
3.55
7.36e-06
2.015e-08
d
yr
n .27798218786727 1.5798e-09 deg/d
Q 2.689457247912299 1.019e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      15120 days (41.40 yr)  
   first obs. used      1978-09-05  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54024  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:07:32  

Additional Information
 Earth MOID = .953876 au 
 Jupiter MOID = 2.71396 au 
 T_jup = 3.550 
[ 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 14.7   n/a MPO381559  
diameter diameter 3.073 km 0.230 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.297   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39177 (2000 WJ157)          Discovered 2000-Nov-30 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 WJ157 = 1978 RK4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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