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JPL Small-Body Database Browser
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(2011 HP4)
Classification: Apollo [NEO]          SPK-ID: 3564019
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2455678.5 (2011-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6134946309914477 0.00091438  
a 2.204881033512082 0.0048093 au
q .8521983574775454 0.00016012 au
i 3.447864892092559 0.0038076 deg
node 41.92157316313402 0.0013825 deg
peri 233.1502385976465 0.0060062 deg
M 347.1444099226818 0.046473 deg
tp 2455721.203717587721
(2011-Jun-08.70371759)
0.014727 TDB
period 1195.848517191251
3.27
3.9126
0.01071
d
yr
n .3010414737525033 0.00098494 deg/d
Q 3.557563709546618 0.0077597 au
  Orbit Determination Parameters
   # obs. used (total)      16  
   data-arc span      2 days  
   first obs. used      2011-04-26  
   last obs. used      2011-04-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .69088  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 05:03:00  

Additional Information
 Earth MOID = .000412676 au 
 Jupiter MOID = 1.60145 au 
 T_jup = 3.386 
[ 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 27.6   n/a MPO361177  

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