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JPL Small-Body Database Browser
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378810 (2008 SG209)
Classification: Mars-crossing Asteroid          SPK-ID: 2378810
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2514394342140759 1.195e-07  
a 2.131517752396703 2.3428e-08 au
q 1.595570134716817 2.7082e-07 au
i 3.712009477947332 6.3414e-06 deg
node 167.8392206756594 9.7709e-05 deg
peri 130.5302497600943 0.00010341 deg
M 312.6616158808559 2.2473e-05 deg
tp 2459149.966128844138
(2020-Oct-27.46612884)
7.173e-05 TDB
period 1136.663352269543
3.11
1.874e-05
5.131e-08
d
yr
n .3167164660329712 5.2217e-09 deg/d
Q 2.667465370076589 2.9319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      7007 days (19.18 yr)  
   first obs. used      2001-02-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43893  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 00:26:35  

Additional Information
 Earth MOID = .583216 au 
 Jupiter MOID = 2.56464 au 
 T_jup = 3.677 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457306.5 (2015-Oct-11.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2517794163669165 1.1962e-07  
q 1.594647462444252 2.7113e-07 au
tp 2456876.188109216545
(2014-Aug-06.68810922)
6.8795e-05 TDB
node 167.8597440340434 9.7733e-05 deg
peri 130.4693321348766 0.00010342 deg
i 3.711219439389605 6.3405e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      7007 days (19.18 yr)  
   first obs. used      2001-02-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43893  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 00:26:35  

Additional Information
 Jupiter MOID = 2.56464 au 
 T_jup = 3.677 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.430795252211854E-14 -3.242047709187809E-14 3.052439655927592E-12 -5.071182476716655E-13 2.29437647828236E-12 -5.726587677704145E-14
q -3.242047709187809E-14 7.351333172087972E-14 -6.750939160690562E-12 1.149482651581378E-12 -5.123033341760122E-12 1.312900335231128E-13
tp 3.052439655927592E-12 -6.750939160690562E-12 4.732759929357952E-9 -2.154102975455964E-10 2.32215251276099E-9 5.482954425316599E-12
node -5.071182476716655E-13 1.149482651581378E-12 -2.154102975455964E-10 9.55171479842166E-9 -9.63807841449747E-9 2.621906676983556E-10
peri 2.29437647828236E-12 -5.123033341760122E-12 2.32215251276099E-9 -9.63807841449747E-9 1.069557557168375E-8 -2.61167976487286E-10
i -5.726587677704145E-14 1.312900335231128E-13 5.482954425316599E-12 2.621906676983556E-10 -2.61167976487286E-10 4.020182025505485E-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 18.7   n/a MPO418924  

378810 (2008 SG209)          Discovered 2008-Sep-28 by Charleston at Charleston
Reference: Last Updated: 2013-11-20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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