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(2021 AE4)
Classification: Apollo [NEO, PHA]          SPK-ID: 54105102
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627821200900174 9.1025e-06  
a 1.160284808624134 1.1607e-05 au
q .9714111875680576 9.2774e-07 au
i 15.76659241169135 0.00057707 deg
node 49.5893273639763 0.00024915 deg
peri 172.5038647790637 0.00021904 deg
M 252.9862405656715 0.0015851 deg
tp 2459336.200815189720
(2021-May-01.70081519)
0.00017166 TDB
period 456.504787108974
1.25
0.00685
1.875e-05
d
yr
n .7886007116811746 1.1833e-05 deg/d
Q 1.349158429680211 1.3496e-05 au
  Orbit Determination Parameters
   # obs. used (total)      35  
   data-arc span      86 days  
   first obs. used      2021-01-06  
   last obs. used      2021-04-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .36162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:45  

Additional Information
 Earth MOID = .0385509 au 
 Jupiter MOID = 3.62403 au 
 T_jup = 5.381 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459245.5 (2021-Jan-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627889988535768 9.1011e-06  
q .9713943345852106 9.2569e-07 au
tp 2459336.202572139657
(2021-May-01.70257214)
0.00017162 TDB
node 49.58605372420855 0.00024938 deg
peri 172.5102210864878 0.00021945 deg
i 15.76622430567125 0.0005771 deg
  Orbit Determination Parameters
   # obs. used (total)      35  
   data-arc span      86 days  
   first obs. used      2021-01-06  
   last obs. used      2021-04-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .36162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:45  

Additional Information
 Jupiter MOID = 3.62403 au 
 T_jup = 5.381 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.282991695928741E-11 -7.72370173226174E-12 3.410771131230421E-10 1.497773355717847E-9 -1.147527834477613E-9 5.2416788322054E-9
q -7.72370173226174E-12 8.568964408135512E-13 -7.35114878584415E-11 -1.378118576895128E-10 5.514677680806263E-11 -4.889115002353755E-10
tp 3.410771131230421E-10 -7.35114878584415E-11 2.945399466688839E-8 2.490052536842736E-8 5.343691469182731E-9 2.594523561736E-8
node 1.497773355717847E-9 -1.378118576895128E-10 2.490052536842736E-8 6.218899030359906E-8 -3.928639986347536E-8 1.008755552784663E-7
peri -1.147527834477613E-9 5.514677680806263E-11 5.343691469182731E-9 -3.928639986347536E-8 4.815810704534622E-8 -7.483119669916193E-8
i 5.2416788322054E-9 -4.889115002353755E-10 2.594523561736E-8 1.008755552784663E-7 -7.483119669916193E-8 3.330425998990035E-7

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 21.83   .32021 E2021-DA1 autocmod 2.8

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