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6012 Williammurdoch (1990 SK4)
Classification: Main-belt Asteroid          SPK-ID: 2006012
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3446235224448927 6.1087e-08  
a 2.631362435233137 2.1966e-08 AU
q 1.724533043973923 1.583e-07 AU
i 18.25084908900413 9.1724e-06 deg
node 62.66057875306554 2.2084e-05 deg
peri 251.6455711443784 2.7502e-05 deg
M 244.002506740386 2.1424e-05 deg
tp 2457502.860560071848
(2016-Apr-24.36056007)
9.6734e-05 JED
period 1559.083705551338
4.27
1.9523e-05
5.345e-08
d
yr
n .2309048569478143 2.8914e-09 deg/d
Q 3.538191826492352 2.9536e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      700  
   data-arc span      13495 days (36.95 yr)  
   first obs. used      1977-05-18  
   last obs. used      2014-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56454  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:07:18  

Additional Information
 Earth MOID = .805418 AU 
 T_jup = 3.245 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO256908  
rotation period rot_per 2.894 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]

6012 Williammurdoch           Discovered 1990 Sept. 22 by R. H. McNaught at Siding Spring.
William Murdoch (1754-1839) was a Scottish engineer, whose wide ranging inventions and developments were often unacknowledged in his lifetime. These developments include gas lighting, the pneumatic messaging system, the steam gun, advances in steam engines, and locomotion on land and sea.
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 2014-08-10Last Updated: 2014-08-13

Alternate Designations
 1990 SK4 = 1977 KU1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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