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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05557161383130393 5.1402e-08  
a 1.071436899103817 7.6734e-08 au
q 1.01189542150221 2.2415e-08 au
i 1.391301256094916 4.1881e-06 deg
node 215.2865829910176 2.2827e-05 deg
peri 350.5938043429169 5.0762e-05 deg
M 77.09864369642428 0.00016604 deg
tp 2459113.745389841758
(2020-Sep-21.24538984)
0.00017778 TDB
period 405.0870178720883
1.11
4.3517e-05
1.191e-07
d
yr
n .8886979441875743 9.547e-08 deg/d
Q 1.130978376705425 8.0999e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46786  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 01:39:42  

Additional Information
 Earth MOID = .00516142 au 
 Jupiter MOID = 3.82462 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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