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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1227233705664849 6.0689e-08  
a 2.318815470667095 1.2195e-08 AU
q 2.034242620385119 1.4138e-07 AU
i 3.074058773441867 5.9011e-06 deg
node 323.7867978190943 0.00011977 deg
peri 241.6643502282351 0.00012212 deg
M 225.1112855884875 2.5207e-05 deg
tp 2457283.748845879322
(2015-Sep-18.24884588)
9.0944e-05 JED
period 1289.72675939232
3.53
1.0174e-05
2.785e-08
d
yr
n .2791288909672783 2.202e-09 deg/d
Q 2.603388320949071 1.3692e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      19485 days (53.35 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52989  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:17:02  

Additional Information
 Earth MOID = 1.03277 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 14.5 mag n/a PDS3 (MPC 36312)  

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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