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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3196406136372924 5.102e-05  
a 1.478019477462846 0.00011628 au
q 1.005584424718752 3.7043e-06 au
i .9663564623179367 0.0001311 deg
node 102.0622314160717 0.00017238 deg
peri 8.823830997401766 5.7151e-05 deg
M 294.9441444548258 0.03477 deg
tp 2459515.104878953848
(2021-Oct-27.60487895)
0.077386 TDB
period 656.324570103245
1.80
0.077453
0.0002121
d
yr
n .5485091011347772 6.473e-05 deg/d
Q 1.95045453020694 0.00015345 au
  Orbit Determination Parameters
   # obs. used (total)      66  
   data-arc span      83 days  
   first obs. used      2019-11-27  
   last obs. used      2020-02-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .50437  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 22:09:22  

Additional Information
 Earth MOID = .0227437 au 
 Jupiter MOID = 3.17108 au 
 T_jup = 4.530 
[ 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 26.1   .40266 MPO545155 autocmod 2.8

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