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266820 (2009 TQ21)
Classification: Main-belt Asteroid          SPK-ID: 2266820
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1818565322408051 5.6362e-08  
a 3.139190940294012 5.1356e-08 au
q 2.568308561850391 1.8215e-07 au
i 5.363821256610456 7.8447e-06 deg
node 129.0073584745456 6.5243e-05 deg
peri 255.9797571498186 6.879e-05 deg
M 333.3876048239441 2.4381e-05 deg
tp 2459150.678059509866
(2020-Oct-28.17805951)
0.00013955 TDB
period 2031.538351429377
5.56
4.9853e-05
1.365e-07
d
yr
n .1772056135424203 4.3485e-09 deg/d
Q 3.710073318737633 6.0695e-08 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      6649 days (18.20 yr)  
   first obs. used      2000-01-28  
   last obs. used      2018-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58434  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:34:16  

Additional Information
 Earth MOID = 1.57878 au 
 Jupiter MOID = 1.77236 au 
 T_jup = 3.178 
[ 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 15.6   n/a MPO440312  

266820 (2009 TQ21)          Discovered 2009-Oct-12 by La Sagra at La Sagra
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
Alternate Designations
 2009 TQ21 = 2000 BR46 = 2004 XU176 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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