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(2008 HU4)
Classification: Apollo [NEO]          SPK-ID: 3409707
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0555772479269479 5.1484e-08  
a 1.07142651603657 7.6685e-08 au
q 1.0118795789193 2.2322e-08 au
i 1.391321599319854 4.1881e-06 deg
node 215.2910745660474 2.2822e-05 deg
peri 350.5495729222143 5.0698e-05 deg
M 259.3954584939503 0.00014764 deg
tp 2459113.702781396912
(2020-Sep-21.20278140)
0.0001779 TDB
period 405.0811294680752
1.11
4.3489e-05
1.191e-07
d
yr
n .888710862618378 9.5411e-08 deg/d
Q 1.13097345315384 8.0947e-08 au
  Orbit Determination Parameters
   # obs. used (total)      76  
   data-arc span      2919 days (7.99 yr)  
   first obs. used      2008-04-30  
   last obs. used      2016-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46687  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Jul-31 10:32:46  

Additional Information
 Earth MOID = .00615421 au 
 Jupiter MOID = 3.82572 au 
 T_jup = 5.762 
[ 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 28.3   n/a MPO378285  

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