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JPL Small-Body Database Browser
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39142 (2000 WR78)
Classification: Main-belt Asteroid          SPK-ID: 2039142
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1667414070054705 3.4303e-08  
a 2.559086633705274 1.6628e-08 au
q 2.132380927752364 9.3219e-08 au
i 4.000680671542801 4.9904e-06 deg
node 356.4407932066324 6.4121e-05 deg
peri 293.4503228968229 6.699e-05 deg
M 31.78633182495446 2.0403e-05 deg
tp 2458868.472675779656
(2020-Jan-19.97267578)
8.4439e-05 TDB
period 1495.291654949936
4.09
1.4574e-05
3.99e-08
d
yr
n .2407557072951451 2.3465e-09 deg/d
Q 2.985792339658185 1.94e-08 au
  Orbit Determination Parameters
   # obs. used (total)      794  
   data-arc span      9273 days (25.39 yr)  
   first obs. used      1994-02-12  
   last obs. used      2019-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54613  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:06:46  

Additional Information
 Earth MOID = 1.12007 au 
 Jupiter MOID = 2.20455 au 
 T_jup = 3.413 
[ 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 15.2   n/a MPO474248  

39142 (2000 WR78)          Discovered 2000-Nov-20 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 WR78 = 1998 BQ22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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