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(2015 HT9)
Classification: Apollo [NEO]          SPK-ID: 3716635
[ 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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3137831775496442 7.9703e-05  
a 1.424758439042756 0.00015392 au
q .9776932087992489 7.9355e-06 au
i 4.79687256916921 0.0010289 deg
node 226.0865937311944 0.00037083 deg
peri 46.92422251377153 0.0007896 deg
M 326.6693965251127 0.17017 deg
tp 2459058.011005422334
(2020-Jul-27.51100542)		 0.30294 TDB
period 621.1697297242009
1.70		 0.10066
0.0002756		 d
yr
n .5795517437075368 9.3918e-05 deg/d
Q 1.871823669286263 0.00020222 au
   Orbit Determination Parameters
   # obs. used (total)      26  
   data-arc span      36 days  
   first obs. used      2015-04-18  
   last obs. used      2015-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .40775  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-10 07:06:36  

Additional Information
 Earth MOID = .0201971 au 
 Jupiter MOID = 3.24237 au 
 T_jup = 4.642 
[ 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 26.0   n/a MPO438013  

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