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(2021 HF1)
Classification: Amor [NEO]          SPK-ID: 54138713
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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2040908250523266 0.00024833  
a 1.305329770297016 0.0004454 au
q 1.038923940511734 3.0355e-05 au
i 1.392413667749986 0.001398 deg
node 47.38782951527585 0.00032468 deg
peri 182.2141594295381 0.0059706 deg
M 265.1362607027786 0.04509 deg
tp 2459344.041185928389
(2021-May-09.54118593)
0.0052701 TDB
period 544.7268610434543
1.49
0.27881
0.0007633
d
yr
n .6608816743686922 0.00033826 deg/d
Q 1.571735600082298 0.00053631 au
  Orbit Determination Parameters
   # obs. used (total)      22  
   data-arc span      19 days  
   first obs. used      2021-04-16  
   last obs. used      2021-05-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .46084  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-07 05:55:23  

Additional Information
 Earth MOID = .0273743 au 
 Jupiter MOID = 3.41031 au 
 T_jup = 4.967 
[ 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 27.86   .36458 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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