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12139 Tomcowling (4055 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012139
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225228353961768 5.4214e-08  
a 2.319664208961038 1.4038e-08 AU
q 2.035452372912102 1.2853e-07 AU
i 3.074139671801038 5.6232e-06 deg
node 323.7842434955078 0.00010464 deg
peri 241.5047805858146 0.00010711 deg
M 281.0790098803798 2.4765e-05 deg
tp 2457283.395561546558
(2015-Sep-17.89556155)
8.9394e-05 JED
period 1290.4349274179
3.53
1.1714e-05
3.207e-08
d
yr
n .2789757099339703 2.5325e-09 deg/d
Q 2.603876045009974 1.5758e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      19847 days (54.34 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51404  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:34:10  

Additional Information
 Earth MOID = 1.03506 AU 
 T_jup = 3.567 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6 mag n/a MPO309247  

12139 Tomcowling           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Thomas G. Cowling (1906-1990), British astrophysicist, was the first to compute a stellar model with a convective core and a radiative envelope. He also developed much of the theory of magnetic fields in stars and magnetospheres.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 4055 P-L = 1992 UJ10 = 1995 PX 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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