Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
12139 Tomcowling (4055 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012139
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225228257523474 5.2659e-08  
a 2.31966420574613 1.3245e-08 AU
q 2.03545239246154 1.2591e-07 AU
i 3.074140425288373 5.5872e-06 deg
node 323.7842999185815 9.6501e-05 deg
peri 241.5047235607618 9.9208e-05 deg
M 281.079012696674 2.438e-05 deg
tp 2457283.395550863322
(2015-Sep-17.89555086)
8.7869e-05 JED
period 1290.434924735208
3.53
1.1052e-05
3.026e-08
d
yr
n .2789757105139343 2.3893e-09 deg/d
Q 2.603876019030721 1.4868e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1049  
   data-arc span      19904 days (54.49 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49377  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:43:16  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Apr-18 19:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin