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(2021 AF8)
Classification: Apollo [NEO, PHA]          SPK-ID: 54106739
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 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5151046711448135 1.3527e-08  
a 2.017651053230345 5.228e-08 au
q .9783495709711414 7.7329e-09 au
i 9.690056655084129 3.0685e-06 deg
node 42.53426707652718 1.1305e-05 deg
peri 168.8580046533037 1.2261e-05 deg
M 23.29113556295031 1.5912e-06 deg
tp 2459328.773960912171
(2021-Apr-24.27396091)
4.2533e-06 TDB
period 1046.809160752224
2.87
4.0686e-05
1.114e-07
d
yr
n .3439022254460484 1.3366e-08 deg/d
Q 3.056952535489548 7.9209e-08 au
  Orbit Determination Parameters
   # obs. used (total)      391  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      2412 days (6.60 yr)  
   first obs. used      2014-12-01  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41509  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-10 05:56:37  

Additional Information
 Earth MOID = .0217344 au 
 Jupiter MOID = 1.90748 au 
 T_jup = 3.631 
[ 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 20.21   .28744 E2021-HE4 autocmod 2.8

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