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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2304699923262437 0.00048153  
a 1.192622913312702 0.00052835 au
q .917759119633421 0.0001677 au
i 3.158578279134694 0.0053677 deg
node 224.4433490505795 0.00044702 deg
peri 49.96407761876367 0.0041619 deg
M 222.537658122821 0.10025 deg
tp 2459382.149575830580
(2021-Jun-16.64957583)
0.011764 TDB
period 475.7219061307516
1.30
0.31613
0.0008655
d
yr
n .7567446345450707 0.00050288 deg/d
Q 1.467486706991983 0.00065012 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 = .00784257 au 
 Jupiter MOID = 3.62251 au 
 T_jup = 5.293 
[ 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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