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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .156556602513702 5.8352e-08  
a 2.32489654447742 8.9355e-09 au
q 1.96091864027819 1.3852e-07 au
i 6.603266352428038 5.8295e-06 deg
node 350.9712590827153 2.6352e-05 deg
peri 354.6355976674408 2.8109e-05 deg
M 165.1908570178871 9.7106e-06 deg
tp 2458006.361930972376
(2017-Sep-09.86193097)
3.4717e-05 TDB
period 1294.803530359941
3.54
7.4647e-06
2.044e-08
d
yr
n .2780344597144587 1.6029e-09 deg/d
Q 2.688874448676651 1.0334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      14855 days (40.67 yr)  
   first obs. used      1978-09-05  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53706  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:07:08  

Additional Information
 Earth MOID = .952981 au 
 Jupiter MOID = 2.7115 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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