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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .649823776283702 0.00064089  
a 2.502958292147901 0.0043618 au
q .8764764828637464 7.6752e-05 au
i 1.339634363386184 0.0010524 deg
node 293.9699842167165 0.0016797 deg
peri 212.7610575441419 0.0020238 deg
M 347.9499323622277 0.033035 deg
tp 2459248.913427471946
(2021-Feb-03.41342747)
0.0061776 TDB
period 1446.36813782422
3.96
3.7808
0.01035
d
yr
n .2488992882140988 0.00065062 deg/d
Q 4.129440101432055 0.0071962 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 = .00434136 au 
 Jupiter MOID = .904135 au 
 T_jup = 3.133 
[ 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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