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(2021 HF2)
Classification: Apollo [NEO]          SPK-ID: 54139098
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 2459324.5 (2021-Apr-20.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6609746177362757 0.0014072  
a 2.201563987105874 0.0081912 au
q .7463860723066178 0.00032101 au
i 3.208491482733994 0.0072329 deg
node 161.3580459675183 0.035277 deg
peri 126.2512841676112 0.035365 deg
M 344.4952630815862 0.096781 deg
tp 2459375.887477121061
(2021-Jun-10.38747712)
0.033972 TDB
period 1193.15096160139
3.27
6.6589
0.01823
d
yr
n .3017220884747269 0.0016839 deg/d
Q 3.65674190190513 0.013605 au
  Orbit Determination Parameters
   # obs. used (total)      57  
   data-arc span      8 days  
   first obs. used      2021-04-19  
   last obs. used      2021-04-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .36845  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-27 06:19:09  

Additional Information
 Earth MOID = .0148807 au 
 Jupiter MOID = 1.56714 au 
 T_jup = 3.338 
[ 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 24.92   .32389 E2021-HE1 autocmod 2.9c

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