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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1220547506547572 5.2479e-08  
a 2.319030797566305 1.3051e-08 au
q 2.035982071808647 1.2555e-07 au
i 3.073682044173605 5.5803e-06 deg
node 323.7803367964413 9.4057e-05 deg
peri 241.4659038458985 9.6855e-05 deg
M 32.70112839232168 2.4329e-05 deg
tp 2457283.329457886824
(2015-Sep-17.82945789)
8.6989e-05 JED
period 1289.906411016929
3.53
1.0889e-05
2.981e-08
d
yr
n .2790900153106342 2.3559e-09 deg/d
Q 2.602079523323963 1.4644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      19983 days (54.71 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49409  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:08:48  

Additional Information
 Earth MOID = 1.03384 au 
 Jupiter MOID = 2.36881 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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