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12137 Williefowler (4004 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012137
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02502531466843153 7.8827e-08  
a 2.651903935513848 1.4136e-08 AU
q 2.585539205057162 2.0769e-07 AU
i 5.323680659215279 8.6008e-06 deg
node 341.9023574089414 7.3172e-05 deg
peri 330.495392877812 0.00019835 deg
M 202.2374087647624 0.00019035 deg
tp 2457491.752378616570
(2016-Apr-13.25237862)
0.00083585 JED
period 1577.375563836342
4.32
1.2613e-05
3.453e-08
d
yr
n .228227194749006 1.8249e-09 deg/d
Q 2.718268665970534 1.449e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      725  
   data-arc span      19513 days (53.42 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56412  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:59:42  

Additional Information
 Earth MOID = 1.57224 AU 
 T_jup = 3.383 
[ 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 14.2 mag n/a MPO253449  

12137 Williefowler           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
William Alfred Fowler (1911-1995) was a nuclear astrophysicist who measured in the laboratory at Caltech the nuclear reactions that occur at lower energies in stars. He also worked on theories of supernovae and early nucleosynthesis.
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

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Alternate Designations
 4004 P-L = 1987 YH5 = 1990 QM8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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