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321509 (2009 SG172)
Classification: Main-belt Asteroid          SPK-ID: 2321509
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07967533067328597 6.8521e-08  
a 3.172623739653066 5.15e-08 au
q 2.91984389409429 2.1129e-07 au
i 7.980262767050919 7.0862e-06 deg
node 248.6781330076138 4.7978e-05 deg
peri 104.3606647982901 6.5986e-05 deg
M 337.7968027384076 4.8293e-05 deg
tp 2459127.803193340514
(2020-Oct-05.30319334)
0.00027827 TDB
period 2064.078837954625
5.65
5.0258e-05
1.376e-07
d
yr
n .1744119426933991 4.2468e-09 deg/d
Q 3.425403585211841 5.5603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      308  
   data-arc span      5810 days (15.91 yr)  
   first obs. used      2003-09-23  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5202  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:10:36  

Additional Information
 Earth MOID = 1.92867 au 
 Jupiter MOID = 1.95871 au 
 T_jup = 3.182 
[ 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 15.4   n/a MPO455368  

321509 (2009 SG172)          Discovered 2009-Sep-21 by CSS at Catalina
Reference: 20120308/Numbers.arcLast Updated: 2012-03-13

Alternate Designations
 2009 SG172 = 2003 UD373 = 2006 AE103 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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