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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09046245809885128 7.5336e-08  
a 5.151173038567822 1.6689e-07 au
q 4.685185263406447 4.5621e-07 au
i 15.34430946128143 1.1136e-05 deg
node 199.6145552411374 2.4507e-05 deg
peri 105.9902085980097 8.5313e-05 deg
M 30.27287098795975 7.355e-05 deg
tp 2458241.405507220763
(2018-May-02.90550722)
0.00087968 TDB
period 4270.292614530708
11.69
0.00020753
5.682e-07
d
yr
n .08430335634963575 4.097e-09 deg/d
Q 5.617160813729196 1.8199e-07 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1995-07-28  
   last obs. used      2019-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53336  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:01:15  

Additional Information
 Earth MOID = 3.71137 au 
 Jupiter MOID = .0580877 au 
 T_jup = 2.921 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457288.5 (2015-Sep-23.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0893889804306806 7.4928e-08  
q 4.686898778379216 4.5257e-07 au
tp 2458237.516354732508
(2018-Apr-29.01635473)
0.0008921 TDB
node 199.6243050212289 2.4505e-05 deg
peri 105.5473958680789 8.6389e-05 deg
i 15.34740954852812 1.1139e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1995-07-28  
   last obs. used      2019-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53336  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:01:15  

Additional Information
 Jupiter MOID = .0580877 au 
 T_jup = 2.921 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.614135292530266E-15 -3.210572790177883E-14 3.803667924886626E-11 -6.239524185698539E-15 3.649953215763926E-12 -3.489264141322399E-15
q -3.210572790177883E-14 2.048220607863331E-13 -2.525329460181159E-10 5.867721265612545E-14 -2.457277787603733E-11 2.649351870851154E-14
tp 3.803667924886626E-11 -2.525329460181159E-10 7.95842006934842E-7 -1.534110283191837E-10 7.386886843915869E-8 -3.75331535148302E-11
node -6.239524185698539E-15 5.867721265612545E-14 -1.534110283191837E-10 6.004931292613096E-10 -5.933261918588757E-10 -3.014682075065081E-11
peri 3.649953215763926E-12 -2.457277787603733E-11 7.386886843915869E-8 -5.933261918588757E-10 7.463009057414626E-9 2.5358203867277E-11
i -3.489264141322399E-15 2.649351870851154E-14 -3.75331535148302E-11 -3.014682075065081E-11 2.5358203867277E-11 1.240675244900304E-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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