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(2021 AU4)
Classification: Apollo [NEO]          SPK-ID: 54105260
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 2459226.5 (2021-Jan-12.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4194715907251299 0.0087279  
a 1.435711927515638 0.017913 au
q .8334715614576108 0.0021319 au
i 13.63290062201568 0.25429 deg
node 117.8550016249492 0.030531 deg
peri 77.93510722627886 0.027187 deg
M 320.4308457581562 0.88481 deg
tp 2459295.564306678527
(2021-Mar-22.06430668)
0.25185 TDB
period 628.3467736587941
1.72
11.76
0.0322
d
yr
n .5729320418146808 0.010722 deg/d
Q 2.037952293573664 0.025427 au
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      6 days  
   first obs. used      2021-01-10  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      9  
   norm. resid. RMS      .27868  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-16 06:03:09  

Additional Information
 Earth MOID = .0547294 au 
 Jupiter MOID = 2.99008 au 
 T_jup = 4.551 
[ 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 24.194   .3269 3 autocmod 2.8

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