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(2009 HK73)
Classification: Apollo [NEO]          SPK-ID: 3459175
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2827253783685272 0.0001305  
a 1.245584526437274 0.000195 au
q .8934261699103129 2.2709e-05 au
i 5.623347382334246 0.002646 deg
node 215.9150077636161 0.006569 deg
peri 300.4260145918409 0.011504 deg
M 28.19002047277343 0.63324 deg
tp 2458960.739565281882
(2020-Apr-21.23956528)
0.88382 TDB
period 507.759705685464
1.39
0.11924
0.0003265
d
yr
n .7089967871987956 0.00016649 deg/d
Q 1.597742882964235 0.00025013 au
  Orbit Determination Parameters
   # obs. used (total)      45  
   data-arc span      22 days  
   first obs. used      2009-04-29  
   last obs. used      2009-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .3751  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:00:39  

Additional Information
 Earth MOID = .001733 au 
 Jupiter MOID = 3.39907 au 
 T_jup = 5.112 
[ 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 26.3   .23994 12 autocmod 2.6i
rotation period rot_per 0.049989 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Statler, T.S.; Cotto-Figueroa, D.; Riethmiller, D.A.; Sweeney, K.M. (2013) Icarus 225, 141-155.]

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