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(2020 HJ4)
Classification: Apollo [NEO, PHA]          SPK-ID: 54016684
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5762898603742426 0.00028924  
a 2.069059590018794 0.00020421 au
q .8766815277808755 0.00053221 au
i 1.221998019943751 0.00046236 deg
node 105.2221281881462 0.0073103 deg
peri 233.2035060400902 0.050396 deg
M 313.3962437693303 0.018041 deg
tp 2459141.226648954629
(2020-Oct-18.72664895)
0.066006 TDB
period 1087.071037212369
2.98
0.16094
0.0004406
d
yr
n .3311651103530143 4.9028e-05 deg/d
Q 3.261437652256712 0.00032189 au
  Orbit Determination Parameters
   # obs. used (total)      38  
   data-arc span      37 days  
   first obs. used      2020-04-16  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .54197  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-21 07:00:29  

Additional Information
 Earth MOID = .000724521 au 
 Jupiter MOID = 2.14858 au 
 T_jup = 3.545 
[ 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 20.18   .28989 7 autocmod 2.8

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