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(2012 HK31)
Classification: Apollo [NEO]          SPK-ID: 3603127
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1207488234984442 0.00026563  
a 1.073788814934416 0.00016865 au
q .9441300788452965 0.00013694 au
i 2.205305472951909 0.0047351 deg
node 222.6615864012989 0.0036595 deg
peri 96.7014905657104 0.0035782 deg
M 9.807748823041326 0.58415 deg
tp 2458989.427553898989
(2020-May-19.92755390)
0.65687 TDB
period 406.4215619999879
1.11
0.095751
0.0002622
d
yr
n .8857797756311235 0.00020869 deg/d
Q 1.203447551023535 0.00018902 au
  Orbit Determination Parameters
   # obs. used (total)      65  
   data-arc span      30 days  
   first obs. used      2012-04-28  
   last obs. used      2012-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .40797  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:49:55  

Additional Information
 Earth MOID = .0147504 au 
 Jupiter MOID = 3.936 au 
 T_jup = 5.747 
[ 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 25.4   n/a MPO232627  

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