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(2021 HG1)
Classification: Aten [NEO]          SPK-ID: 54138714
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2996010519719924 0.0002035  
a .9290127106104961 2.8582e-05 au
q .6506795252162393 0.00016904 au
i 10.50122089289808 0.0089284 deg
node 209.7039425206236 0.00057461 deg
peri 128.0915700404156 0.0054 deg
M 343.0483792536136 0.027142 deg
tp 2459411.900670797669
(2021-Jul-16.40067080)
0.023948 TDB
period 327.0626195635485
0.90
0.015094
4.133e-05
d
yr
n 1.100706649021539 5.0796e-05 deg/d
Q 1.207345896004753 3.7145e-05 au
  Orbit Determination Parameters
   # obs. used (total)      56  
   data-arc span      7 days  
   first obs. used      2021-04-17  
   last obs. used      2021-04-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .43068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-25 06:19:16  

Additional Information
 Earth MOID = .016617 au 
 Jupiter MOID = 4.1638 au 
 T_jup = 6.394 
[ 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 27.05   .42065 E2021-HD3 autocmod 2.9c

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