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312465 (2008 RJ109)
Classification: Jupiter Trojan          SPK-ID: 2312465
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08546815084088602 1.114e-07  
a 5.193570988344105 2.3376e-07 au
q 4.749686079709462 7.4857e-07 au
i 3.164720322076551 1.1538e-05 deg
node 170.5065066684794 0.00012381 deg
peri 225.8004586623761 0.00014188 deg
M 290.0029170571439 7.4194e-05 deg
tp 2459441.072109673964
(2021-Aug-14.57210967)
0.00092091 TDB
period 4323.122432540038
11.84
0.00029187
7.991e-07
d
yr
n .08327314472759058 5.622e-09 deg/d
Q 5.637455896978749 2.5373e-07 au
  Orbit Determination Parameters
   # obs. used (total)      164  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1996-09-08  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53631  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:01:58  

Additional Information
 Earth MOID = 3.757 au 
 Jupiter MOID = .111546 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457437.5 (2016-Feb-19.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08471705355879067 1.1064e-07  
q 4.753289219242511 7.4246e-07 au
tp 2459445.887687344742
(2021-Aug-19.38768734)
0.00093273 TDB
node 170.5387728908424 0.00012381 deg
peri 226.0568166308497 0.00014243 deg
i 3.164411929021371 1.1536e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      164  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1996-09-08  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53631  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:01:58  

Additional Information
 Jupiter MOID = .111546 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.224076211513872E-14 -8.051437123621976E-14 -7.275707592971875E-11 -5.150129989415796E-14 -4.83935982046428E-12 -1.662994130121384E-15
q -8.051437123621976E-14 5.512530238284503E-13 4.846026664303018E-10 3.495387439864951E-13 3.121487659454552E-11 1.437838726313509E-14
tp -7.275707592971875E-11 4.846026664303018E-10 8.699882230996635E-7 4.038578962625048E-10 6.501643948762437E-8 1.254782869669107E-11
node -5.150129989415796E-14 3.495387439864951E-13 4.038578962625048E-10 1.532791278203412E-8 -1.527605942398997E-8 -3.84888437770364E-10
peri -4.83935982046428E-12 3.121487659454552E-11 6.501643948762437E-8 -1.527605942398997E-8 2.028752217857897E-8 3.84997293656737E-10
i -1.662994130121384E-15 1.437838726313509E-14 1.254782869669107E-11 -3.84888437770364E-10 3.84997293656737E-10 1.330783160257533E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9   n/a MPO494656  

312465 (2008 RJ109)          Discovered 2008-Sep-02 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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