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(2008 HU4)
Classification: Apollo [NEO]          SPK-ID: 3409707
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456723.5 (2014-Mar-07.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07324421734219479 2.2391e-08  
q 1.012929194927666 2.386e-08 au
tp 2456655.955477097552
(2013-Dec-29.45547710)
3.9399e-05 TDB
node 221.3366329405067 1.8362e-05 deg
peri 341.5004193737162 5.3944e-05 deg
i 1.257547524679673 3.3547e-06 deg
  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
 Jupiter MOID = 3.82572 au 
 T_jup = 5.762 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.013418687360364E-16 -5.34151679802722E-16 -6.603508005669297E-13 2.954802929325422E-13 -1.018997107720469E-12 4.17952588358525E-14
q -5.34151679802722E-16 5.692963457905538E-16 7.100668479200241E-13 -3.141634954504066E-13 1.090932826617766E-12 -4.518270221969971E-14
tp -6.603508005669297E-13 7.100668479200241E-13 1.552268656799208E-9 -4.115522249133634E-10 2.018868470935426E-9 -6.698564877596915E-11
node 2.954802929325422E-13 -3.141634954504066E-13 -4.115522249133634E-10 3.371693391177921E-10 -7.873237156400484E-10 1.761417346974041E-11
peri -1.018997107720469E-12 1.090932826617766E-12 2.018868470935426E-9 -7.873237156400484E-10 2.909988903178807E-9 -8.784518857614257E-11
i 4.17952588358525E-14 -4.518270221969971E-14 -6.698564877596915E-11 1.761417346974041E-11 -8.784518857614257E-11 1.125395453936307E-11

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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