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(2020 HP4)
Classification: Apollo [NEO]          SPK-ID: 54016690
[ 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 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2970727253871779 0.00046197  
a 1.378592569636399 0.00092688 au
q .969050317776001 1.7808e-05 au
i 29.97268222183316 0.020761 deg
node 33.36634493159918 5.2848e-06 deg
peri 219.261283479711 0.02569 deg
M 123.6390144504198 0.10774 deg
tp 2458997.448893361050
(2020-May-27.94889336)		 0.027971 TDB
period 591.2243697100557
1.62		 0.59626
0.001632		 d
yr
n .6089058882612514 0.00061409 deg/d
Q 1.788134821496796 0.0012022 au
   Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      1 day  
   first obs. used      2020-04-22  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .36842  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-23 05:12:09  

Additional Information
 Earth MOID = .0143954 au 
 Jupiter MOID = 3.29457 au 
 T_jup = 4.626 
[ 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 26.6   .42477 E2020-HC9 autocmod 2.8

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