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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5151605286316884 1.3823e-08  
a 2.018135752812084 5.2096e-08 au
q .9784718715429003 7.7133e-09 au
i 9.697803873073827 3.1359e-06 deg
node 42.567195485871 1.1414e-05 deg
peri 168.9511177900406 1.2313e-05 deg
M 315.8660809343484 2.4762e-06 deg
tp 2459328.878998933654
(2021-Apr-24.37899893)
4.2646e-06 TDB
period 1047.186395283996
2.87
4.0548e-05
1.11e-07
d
yr
n .3437783393875817 1.3311e-08 deg/d
Q 3.057799634081268 7.8933e-08 au
  Orbit Determination Parameters
   # obs. used (total)      376  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      2373 days (6.50 yr)  
   first obs. used      2014-12-01  
   last obs. used      2021-05-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41328  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-01 05:50:46  

Additional Information
 Earth MOID = .0233128 au 
 Jupiter MOID = 1.90787 au 
 T_jup = 3.631 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459064.5 (2020-Aug-03.0) TDB
Reference: JPL 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5152085924784643 1.3821e-08  
q .97832570812284 7.7145e-09 au
tp 2459328.872143166064
(2021-Apr-24.37214317)
4.263e-06 TDB
node 42.57042041366677 1.1414e-05 deg
peri 168.9548955692857 1.2312e-05 deg
i 9.698426225600953 3.1361e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      376  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      2373 days (6.50 yr)  
   first obs. used      2014-12-01  
   last obs. used      2021-05-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41328  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-01 05:50:46  

Additional Information
 Jupiter MOID = 1.90787 au 
 T_jup = 3.631 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.910311170505437E-16 -4.948971776637713E-17 -2.615053599332678E-14 2.484298309048924E-14 -5.368933618618424E-14 -3.093584382931412E-15
q -4.948971776637713E-17 5.951288443061753E-17 2.998786080734555E-14 -4.444139275997863E-14 7.464445216498443E-14 7.168387149245441E-15
tp -2.615053599332678E-14 2.998786080734555E-14 1.817319391316646E-11 -6.718136391696035E-12 2.674547973116442E-11 2.080010459833894E-12
node 2.484298309048924E-14 -4.444139275997863E-14 -6.718136391696035E-12 1.302715709855246E-10 -1.288945826799697E-10 -1.379336617846833E-11
peri -5.368933618618424E-14 7.464445216498443E-14 2.674547973116442E-11 -1.288945826799697E-10 1.51586014756618E-10 1.460882169333265E-11
i -3.093584382931412E-15 7.168387149245441E-15 2.080010459833894E-12 -1.379336617846833E-11 1.460882169333265E-11 9.834851991254298E-12

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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