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295558 (2008 SM55)
Classification: Jupiter Trojan          SPK-ID: 2295558
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09063467218995715 7.3514e-08  
a 5.15424706644434 1.6324e-07 au
q 4.68709357319111 4.4109e-07 au
i 15.3404444891605 1.1122e-05 deg
node 199.6192348571323 2.4157e-05 deg
peri 106.3669592281078 8.4088e-05 deg
M 63.62397471627003 7.2125e-05 deg
tp 2458245.121583397947
(2018-May-06.62158340)
0.00087041 TDB
period 4274.115711717694
11.70
0.00020305
5.559e-07
d
yr
n .08422794895632858 4.0015e-09 deg/d
Q 5.621400559697571 1.7804e-07 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      8946 days (24.49 yr)  
   first obs. used      1995-07-28  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53198  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 16:40:45  

Additional Information
 Earth MOID = 3.71391 au 
 Jupiter MOID = .0588159 au 
 T_jup = 2.921 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457353.5 (2015-Nov-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08945251390791854 7.2625e-08  
q 4.686709813093692 4.3486e-07 au
tp 2458237.358231994801
(2018-Apr-28.85823199)
0.00088534 TDB
node 199.6239711830868 2.4151e-05 deg
peri 105.5379741299219 8.5422e-05 deg
i 15.34714679954737 1.1127e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      8946 days (24.49 yr)  
   first obs. used      1995-07-28  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53198  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 16:40:45  

Additional Information
 Jupiter MOID = .0588159 au 
 T_jup = 2.921 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.274380964217625E-15 -2.979574701986209E-14 3.61055245678399E-11 -2.556742363574009E-15 3.434251669844753E-12 -2.823826216716042E-15
q -2.979574701986209E-14 1.891036979075197E-13 -2.392894710839315E-10 3.445945964834427E-14 -2.309553607765093E-11 2.146778088695167E-14
tp 3.61055245678399E-11 -2.392894710839315E-10 7.838230620084003E-7 -1.043574725972105E-10 7.252135499784244E-8 -2.987143965839514E-11
node -2.556742363574009E-15 3.445945964834427E-14 -1.043574725972105E-10 5.832565732439658E-10 -5.720465856932549E-10 -3.220768746241213E-11
peri 3.434251669844753E-12 -2.309553607765093E-11 7.252135499784244E-8 -5.720465856932549E-10 7.296924292331497E-9 2.810082704861414E-11
i -2.823826216716042E-15 2.146778088695167E-14 -2.987143965839514E-11 -3.220768746241213E-11 2.810082704861414E-11 1.238164976813486E-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 13.7   n/a MPO413252  

295558 (2008 SM55)          Discovered 2008-Sep-20 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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