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266895 (2009 WS81)
Classification: Main-belt Asteroid          SPK-ID: 2266895
[ 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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05948881751385274 4.9202e-08  
a 3.137675621933292 3.7129e-08 au
q 2.951019009442438 1.5634e-07 au
i 11.63921775150123 5.9602e-06 deg
node 101.8442687037008 2.7038e-05 deg
peri 168.505673859404 6.335e-05 deg
M 105.8897911851141 5.5089e-05 deg
tp 2458403.379359989662
(2018-Oct-11.87935999)		 0.00031036 TDB
period 2030.067563623084
5.56		 3.6034e-05
9.866e-08		 d
yr
n .1773339993460631 3.1477e-09 deg/d
Q 3.324332234424146 3.9338e-08 au
   Orbit Determination Parameters
   # obs. used (total)      252  
   data-arc span      6334 days (17.34 yr)  
   first obs. used      2002-06-12  
   last obs. used      2019-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55938  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 12:50:28  

Additional Information
 Earth MOID = 1.93561 au 
 Jupiter MOID = 1.79349 au 
 T_jup = 3.177 
[ 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 15.3   n/a MPO494442  

266895 (2009 WS81)          Discovered 2009-Nov-18 by La Sagra at La Sagra
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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