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266901 (2009 WL121)
Classification: Main-belt Asteroid          SPK-ID: 2266901
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03558862282216051 4.8417e-08  
a 2.93942550053395 3.076e-08 au
q 2.834815395081607 1.3962e-07 au
i 1.140729349380264 5.8248e-06 deg
node 273.4517276985101 0.00026816 deg
peri 38.53984574178719 0.00028208 deg
M 139.1533328985145 8.7622e-05 deg
tp 2458288.986368243093
(2018-Jun-19.48636824)
0.00044851 TDB
period 1840.738573033639
5.04
2.8894e-05
7.911e-08
d
yr
n .195573670956816 3.0699e-09 deg/d
Q 3.044035605986293 3.1855e-08 au
  Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      7794 days (21.34 yr)  
   first obs. used      1998-09-20  
   last obs. used      2020-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 12:50:46  

Additional Information
 Earth MOID = 1.82047 au 
 Jupiter MOID = 2.05199 au 
 T_jup = 3.272 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457237.5 (2015-Aug-03.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03762173549547727 4.9215e-08  
q 2.827450644577576 1.4214e-07 au
tp 2456430.164254788571
(2013-May-17.66425479)
0.0004206 TDB
node 273.9108709088667 0.00026837 deg
peri 34.5211050407387 0.00028053 deg
i 1.141048051583109 5.8183e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      7794 days (21.34 yr)  
   first obs. used      1998-09-20  
   last obs. used      2020-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 12:50:46  

Additional Information
 Jupiter MOID = 2.05199 au 
 T_jup = 3.272 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.422087722447276E-15 -6.849134528657922E-15 -1.641950074057555E-12 1.458499267062246E-14 -3.879766629039456E-13 -1.27294258856644E-16
q -6.849134528657922E-15 2.02036449120924E-14 3.733037041377035E-12 -4.254779881909349E-14 9.921394993289347E-13 7.265703034327756E-16
tp -1.641950074057555E-12 3.733037041377035E-12 1.769036462843022E-7 -1.288236022447982E-10 3.438233982406838E-8 2.63640754057915E-13
node 1.458499267062246E-14 -4.254779881909349E-14 -1.288236022447982E-10 7.202006702656933E-8 -7.20303362240406E-8 -3.127007169847062E-10
peri -3.879766629039456E-13 9.921394993289347E-13 3.438233982406838E-8 -7.20303362240406E-8 7.869531353916855E-8 3.126961649086783E-10
i -1.27294258856644E-16 7.265703034327756E-16 2.63640754057915E-13 -3.127007169847062E-10 3.126961649086783E-10 3.385257672507477E-11

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 16.2   n/a MPO454984  

266901 (2009 WL121)          Discovered 2009-Nov-20 by Spacewatch at Kitt Peak
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
Alternate Designations
 2009 WL121 = 2006 BX252 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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