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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07928372068219414 6.3563e-08  
a 3.171213201488471 3.2197e-08 au
q 2.919787619797972 2.0644e-07 au
i 7.980407831548297 4.3463e-06 deg
node 248.6679966177196 4.728e-05 deg
peri 104.5012312420921 5.9492e-05 deg
M 12.57557063645562 3.2617e-05 deg
tp 2459128.445387293464
(2020-Oct-05.94538729)
0.00018722 TDB
period 2062.702466888933
5.65
3.1413e-05
8.6e-08
d
yr
n .1745283218393438 2.6579e-09 deg/d
Q 3.42263878317897 3.4749e-08 au
  Orbit Determination Parameters
   # obs. used (total)      405  
   data-arc span      6284 days (17.20 yr)  
   first obs. used      2003-09-23  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 07:05:48  

Additional Information
 Earth MOID = 1.92695 au 
 Jupiter MOID = 1.9596 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 15.51   n/a E2021B25  

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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