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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6178940352126716 7.828e-06  
a 1.805879646606688 2.6844e-05 au
q .690037384656448 3.8961e-06 au
i 11.73451491770684 0.00011724 deg
node 126.6865406703111 0.0004061 deg
peri 190.8861832641598 0.00035085 deg
M 5.810835812303034 0.01613 deg
tp 2458986.192368853748
(2020-May-16.69236885)
0.039397 TDB
period 886.4038460259418
2.43
0.019764
5.411e-05
d
yr
n .406135421923095 9.0556e-06 deg/d
Q 2.921721908556927 4.343e-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 = .188199 au 
 Jupiter MOID = 2.41435 au 
 T_jup = 3.788 
[ 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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