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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09349615228673457 7.2908e-08  
a 3.020405005251596 5.7836e-08 au
q 2.738008758912977 2.2174e-07 au
i 13.60832416716111 8.0809e-06 deg
node 80.23643900905991 4.2031e-05 deg
peri 171.7423559834343 7.4542e-05 deg
M 55.88266932063147 5.9487e-05 deg
tp 2458902.874018438750
(2020-Feb-23.37401844)
0.00031543 TDB
period 1917.327047269243
5.25
5.507e-05
1.508e-07
d
yr
n .1877613944437548 5.393e-09 deg/d
Q 3.302801251590215 6.3243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      4462 days (12.22 yr)  
   first obs. used      2008-03-03  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57484  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:42:04  

Additional Information
 Earth MOID = 1.72236 au 
 Jupiter MOID = 1.75376 au 
 T_jup = 3.197 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457344.5 (2015-Nov-18.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0911086281885683 7.3431e-08  
q 2.743905614805498 2.2145e-07 au
tp 2456988.426082685642
(2014-Nov-26.92608269)
0.00031944 TDB
node 80.28311189946525 4.1975e-05 deg
peri 171.9557406758165 7.5654e-05 deg
i 13.61855898966046 8.0868e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      4462 days (12.22 yr)  
   first obs. used      2008-03-03  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57484  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:42:04  

Additional Information
 Jupiter MOID = 1.75376 au 
 T_jup = 3.197 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.392122628535421E-15 -1.582022450239397E-14 8.223683513946649E-13 4.572546642285594E-15 3.165150494937335E-13 -1.040481837786281E-14
q -1.582022450239397E-14 4.904022887286455E-14 -2.819884383774282E-12 -2.865623596994107E-16 -9.455287239933767E-13 3.763789468088026E-14
tp 8.223683513946649E-13 -2.819884383774282E-12 1.020397893667628E-7 3.060008341812826E-10 2.024676255753255E-8 4.370061588974492E-11
node 4.572546642285594E-15 -2.865623596994107E-16 3.060008341812826E-10 1.761891373696999E-9 -1.648869120576682E-9 -2.620858846001242E-11
peri 3.165150494937335E-13 -9.455287239933767E-13 2.024676255753255E-8 -1.648869120576682E-9 5.723559813983573E-9 3.431284579825764E-11
i -1.040481837786281E-14 3.763789468088026E-14 4.370061588974492E-11 -2.620858846001242E-11 3.431284579825764E-11 6.539673407152621E-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 16.43   n/a E2021B25  

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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