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312458 (2008 QS42)
Classification: Jupiter Trojan          SPK-ID: 2312458
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0522359702600539 9.7233e-08  
a 5.255686690579943 3.8458e-07 au
q 4.981150796914648 8.1243e-07 au
i 3.729643211138061 8.2097e-06 deg
node 229.1420873149019 0.00017073 deg
peri 195.3205615622786 0.00023508 deg
M 299.9764262980442 0.00017614 deg
tp 2459734.273420836828
(2022-Jun-03.77342084)
0.0022155 TDB
period 4400.911428781698
12.05
0.00048305
1.323e-06
d
yr
n .08180123727226625 8.9786e-09 deg/d
Q 5.530222584245238 4.0467e-07 au
  Orbit Determination Parameters
   # obs. used (total)      115  
   data-arc span      4050 days (11.09 yr)  
   first obs. used      2008-08-24  
   last obs. used      2019-09-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66607  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 08:11:02  

Additional Information
 Earth MOID = 3.99466 au 
 Jupiter MOID = .0485331 au 
 T_jup = 2.993 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457157.5 (2015-May-15.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05224032426860156 9.5357e-08  
q 4.974174873501919 7.985e-07 au
tp 2455356.726410928134
(2010-Jun-09.22641093)
0.0018755 TDB
node 229.1582813212124 0.00017065 deg
peri 196.5907380253135 0.00023586 deg
i 3.731481866427437 8.216e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      115  
   data-arc span      4050 days (11.09 yr)  
   first obs. used      2008-08-24  
   last obs. used      2019-09-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66607  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 08:11:02  

Additional Information
 Jupiter MOID = .0485331 au 
 T_jup = 2.993 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.093001566870827E-15 -7.19776029808862E-14 -8.646339956249797E-11 2.039600547879844E-14 -8.055010972045384E-12 -4.106047927458412E-15
q -7.19776029808862E-14 6.375985370416983E-13 9.1063781566482E-10 -2.199583178850027E-13 8.503579228392014E-11 4.665481659977273E-14
tp -8.646339956249797E-11 9.1063781566482E-10 3.517619128497678E-6 -8.203695956356527E-10 3.050633007532291E-7 1.007290376256638E-10
node 2.039600547879844E-14 -2.199583178850027E-13 -8.203695956356527E-10 2.912101259780808E-8 -2.913009603250914E-8 -3.136045304825359E-10
peri -8.055010972045384E-12 8.503579228392014E-11 3.050633007532291E-7 -2.913009603250914E-8 5.562958323171699E-8 3.221732262252075E-10
i -4.106047927458412E-15 4.665481659977273E-14 1.007290376256638E-10 -3.136045304825359E-10 3.221732262252075E-10 6.750347486475401E-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 13.9   n/a MPO418615  

312458 (2008 QS42)          Discovered 2008-Aug-24 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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