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(2011 HH1)
Classification: Apollo [NEO]          SPK-ID: 3563861
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 2455677.5 (2011-Apr-26.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5998873018909633 0.0022997  
a 1.898414411062175 0.0095355 au
q .7595797121391649 0.0005506 au
i 11.21203523430111 0.026349 deg
node 71.81696904269113 0.02674 deg
peri 223.3887634272233 0.032464 deg
M 339.1246345237888 0.18052 deg
tp 2455732.900865142708
(2011-Jun-20.40086514)
0.061667 TDB
period 955.3993904491251
2.62
7.1983
0.01971
d
yr
n .3768057668853724 0.002839 deg/d
Q 3.037249109985185 0.015256 au
  Orbit Determination Parameters
   # obs. used (total)      47  
   data-arc span      13 days  
   first obs. used      2011-04-24  
   last obs. used      2011-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .45793  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:53:39  

Additional Information
 Earth MOID = .0812775 au 
 Jupiter MOID = 2.24339 au 
 T_jup = 3.689 
[ 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 21.7   n/a MPO200330  

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2011-May-08 22:48 < 00:01 Earth 0.0836217670181417 0.0828039165343979 0.0844396140939353 17.2688688944532 17.2670236567174 2455690.449679876 0.138907644292349 40774.1222700622 26.7731852293495 0.00854348517393694 237.121360551673 T 11 CATAB v2.0e-lin.ifort 2017-Nov-29 00:18:38 2018-Dec-11 15:39
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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