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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2513959082066559 1.1797e-07  
a 2.131332281558101 2.2745e-08 au
q 1.595524066945638 2.6705e-07 au
i 3.712595124590117 5.9972e-06 deg
node 167.8309155701774 9.6345e-05 deg
peri 130.4692643295495 0.00010169 deg
M 78.1354565918359 2.3064e-05 deg
tp 2459149.827449210681
(2020-Oct-27.32744921)
7.1252e-05 TDB
period 1136.514997897044
3.11
1.8193e-05
4.981e-08
d
yr
n .3167578084461075 5.0705e-09 deg/d
Q 2.667140496170564 2.8463e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4562  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 10:40:43  

Additional Information
 Earth MOID = .582707 au 
 Jupiter MOID = 2.56321 au 
 T_jup = 3.678 
[ 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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