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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08587995267662772 8.9947e-08  
a 5.193597684637032 1.7448e-07 au
q 4.747571761258961 5.7264e-07 au
i 3.164859826465984 1.0742e-05 deg
node 170.5054678551012 9.7895e-05 deg
peri 225.997160099049 0.00011049 deg
M 323.1728259399877 5.0435e-05 deg
tp 2459442.748916293410
(2021-Aug-16.24891629)
0.00060771 TDB
period 4323.15576552751
11.84
0.00021786
5.965e-07
d
yr
n .08327250266358906 4.1964e-09 deg/d
Q 5.639623608015103 1.8947e-07 au
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      8805 days (24.11 yr)  
   first obs. used      1996-09-08  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54415  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:20  

Additional Information
 Earth MOID = 3.75557 au 
 Jupiter MOID = .109334 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457893.5 (2017-May-20.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0847381180205052 8.9986e-08  
q 4.754222231435332 5.7087e-07 au
tp 2459441.919068620188
(2021-Aug-15.41906862)
0.00061731 TDB
node 170.5258830111696 9.7917e-05 deg
peri 225.7439492381144 0.00011093 deg
i 3.164252775262156 1.074e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      8805 days (24.11 yr)  
   first obs. used      1996-09-08  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54415  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:20  

Additional Information
 Jupiter MOID = .109334 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.097432732080437E-15 -4.995995138814133E-14 -2.780428737291146E-11 -1.899300260912658E-14 -1.791714065018255E-12 -1.106170504858097E-15
q -4.995995138814133E-14 3.258873585950592E-13 1.532213564734829E-10 1.230352525839513E-13 8.749208574261451E-12 9.227403171384616E-15
tp -2.780428737291146E-11 1.532213564734829E-10 3.810703963815839E-7 9.561151549004825E-11 3.178505261775794E-8 3.969598216851548E-12
node -1.899300260912658E-14 1.230352525839513E-13 9.561151549004825E-11 9.587718466401865E-9 -9.566301331651899E-9 -7.960617436640539E-11
peri -1.791714065018255E-12 8.749208574261451E-12 3.178505261775794E-8 -9.566301331651899E-9 1.230513046965691E-8 7.96447479109034E-11
i -1.106170504858097E-15 9.227403171384616E-15 3.969598216851548E-12 -7.960617436640539E-11 7.96447479109034E-11 1.153408096384346E-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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