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(2008 HD2)
Classification: Apollo [NEO]          SPK-ID: 3409649
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 2454586.5 (2008-Apr-30.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4457266940540335 0.0010151  
a 1.465531997859062 0.0020971 au
q .8123052654229395 0.00032532 au
i 2.97779903970368 0.005956 deg
node 40.60633493045495 0.0022238 deg
peri 255.5231738591843 0.0034836 deg
M 327.6413928982223 0.086477 deg
tp 2454644.747689449658
(2008-Jun-27.24768945)
0.030644 TDB
period 648.0244386268669
1.77
1.3909
0.003808
d
yr
n .5555346041621871 0.0011924 deg/d
Q 2.118758730295184 0.0030319 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      7 days  
   first obs. used      2008-04-27  
   last obs. used      2008-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .50721  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:03:37  

Additional Information
 Earth MOID = .00637266 au 
 Jupiter MOID = 3.1077 au 
 T_jup = 4.499 
[ 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 25.0   n/a MPO139312  

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