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(2018 HR1)
Classification: Apollo [NEO]          SPK-ID: 3819561
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 2458233.5 (2018-Apr-25.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6063579109293733 0.0016286  
a 1.909197819465873 0.0068337 au
q .7515406181036315 0.00041932 au
i 2.681940710801269 0.0074041 deg
node 155.2806220339153 0.057479 deg
peri 140.3722782966015 0.05769 deg
M 339.1786078166013 0.12808 deg
tp 2458289.229107134710
(2018-Jun-19.72910713)
0.043597 TDB
period 963.5512549680429
2.64
5.1733
0.01416
d
yr
n .3736179037117643 0.002006 deg/d
Q 3.066855020828115 0.010977 au
  Orbit Determination Parameters
   # obs. used (total)      38  
   data-arc span      14 days  
   first obs. used      2018-04-21  
   last obs. used      2018-05-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .61948  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-05 07:01:27  

Additional Information
 Earth MOID = .0236427 au 
 Jupiter MOID = 2.17484 au 
 T_jup = 3.688 
[ 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 24.2   n/a MPO450738  

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