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(2021 AN4)
Classification: Apollo [NEO]          SPK-ID: 54105111
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3075959424232411 0.00036336  
a 1.464054118102635 0.00081505 au
q 1.013717011886228 3.2394e-05 au
i 1.060397791411427 0.0010542 deg
node 271.5744101138641 0.0036239 deg
peri 207.7783654250662 0.0066333 deg
M 230.0335835141635 0.10728 deg
tp 2459234.094582447358
(2021-Jan-19.59458245)		 0.0027437 TDB
period 647.0444592908603
1.77		 0.54032
0.001479		 d
yr
n .5563759875087227 0.00046461 deg/d
Q 1.914391224319042 0.0010658 au
   Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      8 days  
   first obs. used      2021-01-10  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .49117  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-21 05:19:39  

Additional Information
 Earth MOID = .0310313 au 
 Jupiter MOID = 3.17539 au 
 T_jup = 4.563 
[ 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 27.49   .58013 E2021-BA4 autocmod 2.8

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