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(2021 JR4)
Classification: Apollo [NEO]          SPK-ID: 54144924
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5152542022918796 0.00024715  
a 2.061424746643533 0.0010393 au
q .9992669832269796 5.6985e-06 au
i 2.776242461824304 0.0010076 deg
node 37.51096286866655 0.0014389 deg
peri 211.2027678555072 0.0023417 deg
M 306.0396126303866 0.040805 deg
tp 2459362.539991879249
(2021-May-28.03999188)
2.4343e-05 TDB
period 1081.059642455039
2.96
0.81753
0.002238
d
yr
n .3330066037637441 0.00025183 deg/d
Q 3.123582510060087 0.0015748 au
  Orbit Determination Parameters
   # obs. used (total)      34  
   data-arc span      30 days  
   first obs. used      2021-04-15  
   last obs. used      2021-05-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .50239  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-01 05:50:50  

Additional Information
 Earth MOID = .0122329 au 
 Jupiter MOID = 1.93092 au 
 T_jup = 3.602 
[ 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 25.047   .45753 4 autocmod 2.9c

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