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(2011 HP)
Classification: Apollo [NEO]          SPK-ID: 3563857
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 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4805926092496737 1.0697e-08  
a 1.920001068499899 2.5224e-09 au
q .997262745227371 2.0212e-08 au
i 3.725030831202457 3.1122e-06 deg
node 229.530092343591 1.567e-05 deg
peri 46.29170793639664 1.6702e-05 deg
M 127.4164815704564 2.1109e-06 deg
tp 2458656.567085326678
(2019-Jun-22.06708533)
5.5598e-06 TDB
period 971.7412359556531
2.66
1.9149e-06
5.243e-09
d
yr
n .3704689959420732 7.3004e-10 deg/d
Q 2.842739391772427 3.7346e-09 au
  Orbit Determination Parameters
   # obs. used (total)      371  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      3092 days (8.47 yr)  
   first obs. used      2011-04-13  
   last obs. used      2019-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34638  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-03 06:33:42  

Additional Information
 Earth MOID = .0277115 au 
 Jupiter MOID = 2.31114 au 
 T_jup = 3.773 
[ 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 22.1   n/a MPO215182  
rotation period rot_per 3.9398 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Hicks, M.; Sommers, J.; Truong, T.; McCormack, M.; et al. (2011) Astronomer's Telegram 3419. http://www.astronomerstelegram.org]
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46-4, submitted. (NEA Gaggle) http://www.planetarysciences.org/lightcurves.html]

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