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145545 Wensayling (2006 KA39)
Classification: Outer Main-belt Asteroid          SPK-ID: 2145545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .165289378053306 4.4477e-08  
a 3.294645446766697 3.468e-08 au
q 2.750075549964473 1.4592e-07 au
i 15.42958323519751 5.759e-06 deg
node 77.99071284349378 1.8009e-05 deg
peri 122.9245749173406 2.4306e-05 deg
M 158.4027865796592 1.7211e-05 deg
tp 2458039.392932848538
(2017-Oct-12.89293285)
0.00010094 TDB
period 2184.295817299445
5.98
3.4488e-05
9.442e-08
d
yr
n .1648128413508964 2.6022e-09 deg/d
Q 3.839215343568922 4.0412e-08 au
  Orbit Determination Parameters
   # obs. used (total)      351  
   data-arc span      7557 days (20.69 yr)  
   first obs. used      1999-02-19  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60131  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:58:46  

Additional Information
 Earth MOID = 1.78059 au 
 Jupiter MOID = 1.33612 au 
 T_jup = 3.092 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457286.5 (2015-Sep-21.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647173024981655 4.4765e-08  
q 2.753382191677593 1.4719e-07 au
tp 2458043.387774260705
(2017-Oct-16.88777426)
0.0001006 TDB
node 78.04036195878608 1.8033e-05 deg
peri 123.6928449297502 2.4275e-05 deg
i 15.41677665200439 5.7541e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      351  
   data-arc span      7557 days (20.69 yr)  
   first obs. used      1999-02-19  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60131  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:58:46  

Additional Information
 Jupiter MOID = 1.33612 au 
 T_jup = 3.092 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.003882499410204E-15 -6.459635751005057E-15 9.564255354633606E-13 3.590781036908339E-15 1.386146991333588E-13 1.452491884808883E-15
q -6.459635751005057E-15 2.166535696719734E-14 -2.747624950073998E-12 -1.169042573697049E-14 -4.510793010409066E-13 -2.49748200260266E-15
tp 9.564255354633606E-13 -2.747624950073998E-12 1.012022753079511E-8 -7.246901352250008E-12 1.651221891180643E-9 6.181761633592297E-12
node 3.590781036908339E-15 -1.169042573697049E-14 -7.246901352250008E-12 3.251872354643218E-10 -3.144053801310157E-10 -3.336942894251588E-12
peri 1.386146991333588E-13 -4.510793010409066E-13 1.651221891180643E-9 -3.144053801310157E-10 5.892755777140071E-10 3.986146409358024E-12
i 1.452491884808883E-15 -2.49748200260266E-15 6.181761633592297E-12 -3.336942894251588E-12 3.986146409358024E-12 3.310986183801683E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO493828  
diameter diameter 5.837 km 1.415 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.062   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

145545 Wensayling           Discovered 2006 May 22 by Q.-z. Ye and T.-C. Yang at Lulin Observatory.
Sayling Wen (1948-2003), a tireless educator and promoter for social work, was instrumental in in establishing computer networks for "e-learning" at schools in many villages in Taiwan, China and Asia. His humanitarian spirit has also helped shape university education in Asia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080520/MPCPages.arcLast Updated: 2008-05-22

Alternate Designations
 2006 KA39 = 2003 YR123 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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