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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1649686453548053 4.4331e-08  
a 3.295700502797939 3.2501e-08 au
q 2.752013255356212 1.4481e-07 au
i 15.42796394792228 4.9017e-06 deg
node 77.9972165582964 1.7215e-05 deg
peri 122.8166173819207 2.2048e-05 deg
M 223.7867686324683 1.6658e-05 deg
tp 2460223.369226693129
(2023-Oct-05.86922669)
0.00010794 TDB
period 2185.345128523841
5.98
3.2327e-05
8.851e-08
d
yr
n .1647337051256399 2.4368e-09 deg/d
Q 3.839387750239666 3.7863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7999 days (21.90 yr)  
   first obs. used      1999-02-19  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58237  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:57:20  

Additional Information
 Earth MOID = 1.78326 au 
 Jupiter MOID = 1.33417 au 
 T_jup = 3.092 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457746.5 (2016-Dec-24.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1650510662998868 4.462e-08  
q 2.752330053120687 1.4619e-07 au
tp 2458043.177043095861
(2017-Oct-16.67704310)
9.1697e-05 TDB
node 78.03778814499601 1.7238e-05 deg
peri 123.6963026757378 2.1995e-05 deg
i 15.41745499709998 4.8993e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7999 days (21.90 yr)  
   first obs. used      1999-02-19  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58237  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:57:20  

Additional Information
 Jupiter MOID = 1.33417 au 
 T_jup = 3.092 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.990972505800783E-15 -6.411109984174939E-15 8.661098676773722E-13 5.11532808916653E-15 1.190057248577537E-13 2.76171631048096E-15
q -6.411109984174939E-15 2.137224082026896E-14 -2.043974477299121E-12 -1.621653710866065E-14 -2.963626566708744E-13 -7.407436063757057E-15
tp 8.661098676773722E-13 -2.043974477299121E-12 8.408276799682897E-9 -8.538936474863562E-12 1.283843265657412E-9 6.285376973045777E-12
node 5.11532808916653E-15 -1.621653710866065E-14 -8.538936474863562E-12 2.971346704853534E-10 -2.87543926033898E-10 -1.847250763870234E-11
peri 1.190057248577537E-13 -2.963626566708744E-13 1.283843265657412E-9 -2.87543926033898E-10 4.837878916953284E-10 1.864933731418697E-11
i 2.76171631048096E-15 -7.407436063757057E-15 6.285376973045777E-12 -1.847250763870234E-11 1.864933731418697E-11 2.400346872465491E-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 15.00   n/a MPCxxxxx  
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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