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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5765766978769968 1.8863e-07  
a 2.069212808967937 4.5339e-08 au
q .876152920368419 3.9399e-07 au
i 1.222444641892487 1.2001e-05 deg
node 105.2178672702497 0.001431 deg
peri 233.2514365897785 0.0014313 deg
M 313.3798672045945 1.8989e-05 deg
tp 2459141.291737827506
(2020-Oct-18.79173783)
5.5952e-05 TDB
period 1087.191789871892
2.98
3.5733e-05
9.783e-08
d
yr
n .3311283283719611 1.0883e-08 deg/d
Q 3.262272697567456 7.1481e-08 au
  Orbit Determination Parameters
   # obs. used (total)      66  
   data-arc span      2480 days (6.79 yr)  
   first obs. used      2014-04-04  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62927  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-17 06:06:40  

Additional Information
 Earth MOID = .000706735 au 
 Jupiter MOID = 2.14788 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 20.14   .40085 E2021B25 autocmod 2.8

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