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JPL Small-Body Database Browser
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(2015 HP171)
Classification: Apollo [NEO]          SPK-ID: 3718763
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6177603764470134 7.7981e-06  
a 1.805856251988301 2.6892e-05 au
q .6902698139508155 3.8203e-06 au
i 11.73362052302703 0.00011689 deg
node 126.6849077637571 0.00040575 deg
peri 190.8867837810979 0.00035103 deg
M 203.3404944478459 0.012504 deg
tp 2458986.224694010367
(2020-May-16.72469401)
0.039404 TDB
period 886.3866214457277
2.43
0.0198
5.421e-05
d
yr
n .4061433140911213 9.0723e-06 deg/d
Q 2.921442690025787 4.3505e-05 au
  Orbit Determination Parameters
   # obs. used (total)      113  
   data-arc span      220 days  
   first obs. used      2015-04-28  
   last obs. used      2015-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .36733  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:34:02  

Additional Information
 Earth MOID = .18816 au 
 Jupiter MOID = 2.41149 au 
 T_jup = 3.789 
[ 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 20.1   n/a MPO337149  

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