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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2515160938619905 1.1795e-07  
a 2.131768126318232 2.3102e-08 au
q 1.595594134167176 2.6733e-07 au
i 3.712307845619062 5.9965e-06 deg
node 167.8306455992453 9.6351e-05 deg
peri 130.5004765517075 0.00010168 deg
M 16.02533440196526 2.2658e-05 deg
tp 2459149.892722597470
(2020-Oct-27.39272260)
7.1246e-05 TDB
period 1136.863631543094
3.11
1.848e-05
5.06e-08
d
yr
n .3166606706482137 5.1475e-09 deg/d
Q 2.667942118469287 2.8913e-08 au
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      7034 days (19.26 yr)  
   first obs. used      2001-02-20  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45615  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:08:49  

Additional Information
 Earth MOID = .581276 au 
 Jupiter MOID = 2.5635 au 
 T_jup = 3.677 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.86   n/a E2021B25  

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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