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441812 (2009 JH8)
Classification: Main-belt Asteroid          SPK-ID: 2441812
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09300410467100083 7.5545e-08  
a 3.020287533051455 6.4585e-08 au
q 2.739388395191019 2.3742e-07 au
i 13.61850749489264 8.142e-06 deg
node 80.27025353981315 4.651e-05 deg
peri 172.0615674495196 7.9349e-05 deg
M 18.05869053880389 6.5216e-05 deg
tp 2458904.326678155755
(2020-Feb-24.82667816)
0.00034633 TDB
period 1917.215192847614
5.25
6.1495e-05
1.684e-07
d
yr
n .187772348843792 6.0229e-09 deg/d
Q 3.301186670911892 7.0591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      74  
   data-arc span      4104 days (11.24 yr)  
   first obs. used      2008-03-03  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57227  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:42:27  

Additional Information
 Earth MOID = 1.72528 au 
 Jupiter MOID = 1.7568 au 
 T_jup = 3.197 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457208.5 (2015-Jul-05.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09105122952102146 7.57e-08  
q 2.743981145034075 2.3727e-07 au
tp 2456988.404228881004
(2014-Nov-26.90422888)
0.00033846 TDB
node 80.28617640693174 4.651e-05 deg
peri 171.9510480883784 8.0408e-05 deg
i 13.61904984722503 8.1431e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      74  
   data-arc span      4104 days (11.24 yr)  
   first obs. used      2008-03-03  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57227  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:42:27  

Additional Information
 Jupiter MOID = 1.7568 au 
 T_jup = 3.197 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.730421095125126E-15 -1.738544742301509E-14 -1.210260854121777E-12 7.23178730954141E-15 -6.179026734721519E-14 -1.396453635807705E-14
q -1.738544742301509E-14 5.629788368783625E-14 6.636392847994971E-12 1.554055209196036E-14 7.878118442119803E-13 5.297039419382477E-14
tp -1.210260854121777E-12 6.636392847994971E-12 1.14552924666977E-7 4.783263056475874E-10 2.23966477043802E-8 5.661539744056818E-11
node 7.23178730954141E-15 1.554055209196036E-14 4.783263056475874E-10 2.163178725009843E-9 -2.004755889545251E-9 -4.490987370755893E-11
peri -6.179026734721519E-14 7.878118442119803E-13 2.23966477043802E-8 -2.004755889545251E-9 6.465516565970693E-9 5.477295723906486E-11
i -1.396453635807705E-14 5.297039419382477E-14 5.661539744056818E-11 -4.490987370755893E-11 5.477295723906486E-11 6.630926628931357E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO477084  

441812 (2009 JH8)          Discovered 2009-Apr-20 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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