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JPL Small-Body Database Browser
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(2019 WR4)
Classification: Apollo [NEO]          SPK-ID: 3893722
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458816.5 (2019-Nov-29.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3217857924956808 0.0013425  
a 1.482529473081138 0.0030169 au
q 1.00547255168752 5.8444e-05 au
i .965940534732226 0.003488 deg
node 102.1988447117422 0.0063221 deg
peri 8.366330770595436 0.019806 deg
M 337.1476757487928 0.066572 deg
tp 2458858.353454321457
(2020-Jan-09.85345432)
0.0064386 TDB
period 659.3309017540575
1.81
2.0126
0.00551
d
yr
n .5460080803770465 0.0016666 deg/d
Q 1.959586394474756 0.0039877 au
  Orbit Determination Parameters
   # obs. used (total)      22  
   data-arc span      10 days  
   first obs. used      2019-11-27  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .30292  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-07 05:37:46  

Additional Information
 Earth MOID = .0220925 au 
 Jupiter MOID = 3.16418 au 
 T_jup = 4.520 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.116   .34163 3 autocmod 2.8

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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