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9526 Billmckinnon (1981 EC13)
Classification: Main-belt Asteroid          SPK-ID: 2009526
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02560263971182746 4.6474e-08  
a 2.919307833561778 1.9837e-08 au
q 2.84456584689118 1.3985e-07 au
i 6.565321435814266 4.9937e-06 deg
node 310.0815214628783 4.4348e-05 deg
peri 282.7444887436433 0.0001106 deg
M 261.4757872196708 0.00010294 deg
tp 2459499.107421626763
(2021-Oct-11.60742163)
0.0005217 TDB
period 1821.873697035744
4.99
1.857e-05
5.084e-08
d
yr
n .1975987691055276 2.014e-09 deg/d
Q 2.994049820232375 2.0345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      14314 days (39.19 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5196  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:12:11  

Additional Information
 Earth MOID = 1.8414 au 
 Jupiter MOID = 2.03585 au 
 T_jup = 3.270 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO381339  

9526 Billmckinnon           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
William B. McKinnon (b. 1954) is a professor of planetary science at Washington University in St. Louis. His research focuses on the physics of impact cratering for surfaces of rocky and icy bodies, ranging from the Jovian satellite system to the Kuiper Belt.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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