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(2021 HA)
Classification: Apollo [NEO]          SPK-ID: 54137799
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2314991729454554 0.00047796  
a 1.195574878490553 0.00051972 au
q .9188002829256268 0.00017204 au
i 3.176721007088971 0.0052933 deg
node 224.3317888260397 0.0004558 deg
peri 49.48132870318791 0.0070404 deg
M 11.19565665101819 0.00083117 deg
tp 2459381.650539731668
(2021-Jun-16.15053973)
0.0086472 TDB
period 477.4892499149224
1.31
0.31135
0.0008524
d
yr
n .7539436753060801 0.00049161 deg/d
Q 1.472349474055479 0.00064003 au
  Orbit Determination Parameters
   # obs. used (total)      21  
   data-arc span      16 days  
   first obs. used      2021-04-06  
   last obs. used      2021-04-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .37785  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-22 06:20:18  

Additional Information
 Earth MOID = .00739495 au 
 Jupiter MOID = 3.61499 au 
 T_jup = 5.283 
[ 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 25.58   .30265 E2021-HB4 autocmod 2.9c

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