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266905 (2009 WP177)
Classification: Main-belt Asteroid          SPK-ID: 2266905
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 .1498118168736624 9.9732e-08  
a 3.085470042643123 4.9435e-08 au
q 2.6232301696455 3.0096e-07 au
i 9.512330836001658 9.1315e-06 deg
node 237.5969400287508 4.6702e-05 deg
peri 305.8619399545421 5.2552e-05 deg
M 227.0421242343331 2.698e-05 deg
tp 2459731.625607417072
(2022-Jun-01.12560742)
0.00015572 TDB
period 1979.613596820956
5.42
4.7575e-05
1.303e-07
d
yr
n .1818536711296188 4.3704e-09 deg/d
Q 3.547709915640746 5.6841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      6766 days (18.52 yr)  
   first obs. used      2001-04-17  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59782  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 04:07:12  

Additional Information
 Earth MOID = 1.63818 au 
 Jupiter MOID = 1.52442 au 
 T_jup = 3.188 
[ 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 15.5   n/a MPO454984  
diameter diameter 4.734 km 1.623 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

266905 (2009 WP177)          Discovered 2009-Nov-23 by Mt. Lemmon Survey at Mount Lemmon
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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