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295412 (2008 JR28)
Classification: Jupiter Trojan          SPK-ID: 2295412
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05035677254016378 7.9951e-08  
a 5.214005217244772 1.5314e-07 au
q 4.95144474249675 4.9045e-07 au
i 12.91934524494827 8.0623e-06 deg
node 212.9326089198579 2.709e-05 deg
peri 13.76681738937321 7.16e-05 deg
M 17.55306146897279 6.2921e-05 deg
tp 2458788.465762947177
(2019-Oct-31.96576295)
0.00076313 TDB
period 4348.661655059039
11.91
0.00019159
5.245e-07
d
yr
n .0827840904985542 3.6472e-09 deg/d
Q 5.476565691992794 1.6086e-07 au
  Orbit Determination Parameters
   # obs. used (total)      260  
   data-arc span      8773 days (24.02 yr)  
   first obs. used      1996-04-20  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56978  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:42:31  

Additional Information
 Earth MOID = 3.94401 au 
 Jupiter MOID = .481078 au 
 T_jup = 2.947 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457260.5 (2015-Aug-26.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04697394482998509 7.9637e-08  
q 4.9559993996396 4.8925e-07 au
tp 2458785.195220001381
(2019-Oct-28.69522000)
0.00081726 TDB
node 212.947599703258 2.7079e-05 deg
peri 13.28596756919733 7.609e-05 deg
i 12.92969585033817 8.0684e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      260  
   data-arc span      8773 days (24.02 yr)  
   first obs. used      1996-04-20  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56978  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:42:31  

Additional Information
 Jupiter MOID = .481078 au 
 T_jup = 2.947 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.342076306253032E-15 -3.734938499000321E-14 6.158264584554638E-12 -8.316095457497954E-15 8.328730688388594E-13 2.491491304226464E-15
q -3.734938499000321E-14 2.393673514990942E-13 -7.031836511016412E-11 7.142849834413451E-14 -8.508129835780763E-12 -1.283324469481114E-14
tp 6.158264584554638E-12 -7.031836511016412E-11 6.679142412091199E-7 -9.232421178391227E-11 5.796686522144113E-8 3.989642066530988E-11
node -8.316095457497954E-15 7.142849834413451E-14 -9.232421178391227E-11 7.332681557345648E-10 -7.233709301734639E-10 1.480976271565118E-11
peri 8.328730688388594E-13 -8.508129835780763E-12 5.796686522144113E-8 -7.233709301734639E-10 5.789686127361417E-9 -1.107505233690429E-11
i 2.491491304226464E-15 -1.283324469481114E-14 3.989642066530988E-11 1.480976271565118E-11 -1.107505233690429E-11 6.50985043791143E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO437321  

295412 (2008 JR28)          Discovered 2008-May-08 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

Alternate Designations
 2008 JR28 = 2007 EC209 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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