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266740 (2009 ST33)
Classification: Main-belt Asteroid          SPK-ID: 2266740
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09004551331740739 1.6111e-07  
a 2.584303910127345 2.862e-08 au
q 2.351598937971745 4.2078e-07 au
i 2.855827803962079 1.0146e-05 deg
node 312.2892191145701 0.00013479 deg
peri 170.8923228340713 0.0001531 deg
M 111.1934440288833 6.2992e-05 deg
tp 2458531.804822387340
(2019-Feb-17.30482239)
0.00026548 TDB
period 1517.447952207764
4.15
2.5207e-05
6.901e-08
d
yr
n .2372404269129819 3.941e-09 deg/d
Q 2.817008882282945 3.1197e-08 au
  Orbit Determination Parameters
   # obs. used (total)      122  
   data-arc span      4854 days (13.29 yr)  
   first obs. used      2005-10-25  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:04:21  

Additional Information
 Earth MOID = 1.36726 au 
 Jupiter MOID = 2.23045 au 
 T_jup = 3.415 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.3   n/a MPO334527  

266740 (2009 ST33)          Discovered 2009-Sep-16 by Spacewatch at Kitt Peak
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
Alternate Designations
 2009 ST33 = 2005 UD221 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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