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(2021 EH4)
Classification: Apollo [NEO]          SPK-ID: 54131485
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1465163871336475 6.4342e-05  
a 1.150786298870877 8.3292e-05 au
q .9821772479974143 2.9707e-06 au
i 12.28705545155411 0.003773 deg
node 14.52852167862515 0.00025857 deg
peri 233.8125426456189 0.0037069 deg
M 29.44079232350603 0.00056111 deg
tp 2459359.624540242822
(2021-May-25.12454024)
0.0046971 TDB
period 450.9106061654817
1.23
0.048954
0.000134
d
yr
n .7983844138451734 8.6679e-05 deg/d
Q 1.31939534974434 9.5496e-05 au
  Orbit Determination Parameters
   # obs. used (total)      49  
   data-arc span      36 days  
   first obs. used      2021-03-10  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .5802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-16 06:26:27  

Additional Information
 Earth MOID = .0318125 au 
 Jupiter MOID = 3.69166 au 
 T_jup = 5.431 
[ 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 24.94   .30508 E2021H07 autocmod 2.9c

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