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(2021 AB)
Classification: Apollo [NEO]          SPK-ID: 54104072
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6516707787364201 0.00063804  
a 2.518898596941632 0.0043888 au
q .8774059867146028 7.8468e-05 au
i 1.42483036767972 0.00089187 deg
node 293.3236069430916 0.0027308 deg
peri 213.1559528054882 0.0012251 deg
M 36.42979675997205 0.093812 deg
tp 2459248.735978848873
(2021-Feb-03.23597885)
0.0056712 TDB
period 1460.207092696567
4.00
3.8162
0.01045
d
yr
n .2465403721161137 0.00064433 deg/d
Q 4.160391207168662 0.0072488 au
  Orbit Determination Parameters
   # obs. used (total)      55  
   data-arc span      1 day  
   first obs. used      2021-01-02  
   last obs. used      2021-01-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .50817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:25  

Additional Information
 Earth MOID = .00432745 au 
 Jupiter MOID = .874794 au 
 T_jup = 3.121 
[ 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 25.18   .2937 E2021A28 autocmod 2.8

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