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266838 (2009 UW21)
Classification: Main-belt Asteroid          SPK-ID: 2266838
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019263069763103 4.8755e-08  
a 2.576909154117722 2.2791e-08 au
q 2.314254320625055 1.2549e-07 au
i 5.623655958386146 5.2187e-06 deg
node 132.6720564804397 6.0664e-05 deg
peri 184.4068553110504 6.6996e-05 deg
M 262.195169823039 2.9096e-05 deg
tp 2459410.992183556927
(2021-Jul-15.49218356)
0.00012293 TDB
period 1510.939549847553
4.14
2.0045e-05
5.488e-08
d
yr
n .2382623448014994 3.1609e-09 deg/d
Q 2.839563987610389 2.5114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      4817 days (13.19 yr)  
   first obs. used      2007-02-14  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58946  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 15:25:30  

Additional Information
 Earth MOID = 1.30077 au 
 Jupiter MOID = 2.40722 au 
 T_jup = 3.413 
[ 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 16.8   n/a MPO433732  

266838 (2009 UW21)          Discovered 2009-Oct-16 by CSS at Catalina
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
Alternate Designations
 2009 UW21 = 2008 LZ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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