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Science 25 January 1980:
Vol. 207. no. 4429, pp. 439 - 443
DOI: 10.1126/science.207.4429.439
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Articles

Pioneer Saturn Infrared Radiometer: Preliminary Results

A. P. INGERSOLL 1, G. S. ORTON 2, G. MÜNCH 3, G. NEUGEBAUER 4, and S. C. CHASE 5

1 Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91125
2 Earth and Space Sciences Division, Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103
3 Max-Planck-Institut für Astronomie, 6900 Heidelberg-Königstuhl, Federal Republic of Germany
4 Division of Physics, Mathematics, and Astronomy, California Institute of Technology
5 Santa Barbara Research Center, Goleta, California 93017

The effective temperature of Saturn, 94.4 + 3 K, implies a total emission greater than two times the absorbed sunlight. The infrared data alone give an atmospheric abundance of H2 relative to H2 + He of 0.85 ± 0.15. Comparison of infrared and radio occultation data will give a more precise estimate. Temperature at the 1-bar level is 137 to 140 K, and 2.5 K differences exist between belts and zones up to the 0.06-bar level. Ring temperatures range from 60 to 70 K on the south (illuminated) side and from < 60 to 67 K in the planet's shadow. The average temperature of the north (unilluminated) side is sim 55 K. Titan's 45-micrometer brightness temperature is 80 ± 10 K.

Submitted on December 3, 1979


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Infrared Observations of the Saturnian System from Voyager 1.
R. HANEL, B. CONRATH, F. M. FLASAR, V. KUNDE, W. MAGUIRE, J. PEARL, J. PIRRAGLIA, R. SAMUELSON, L. HERATH, M. ALLISON, et al. (1981)
Science 212, 192-200
   Abstract »    PDF »
Radio Science Investigations of the Saturn System with Voyager 1: Preliminary Results.
G. L. TYLER, V. R. ESHLEMAN, J. D. ANDERSON, G. S. LEVY, G. F. LINDAL, G. E. WOOD, and T. A. CROFT (1981)
Science 212, 201-206
   Abstract »    PDF »
Brightness Temperatures of Saturn's Disk and Rings at 400 and 700 Micrometers.
S. E. WHITCOMB, R. H. HILDEBRAND, and J. KEENE (1980)
Science 210, 788-789
   Abstract »    PDF »
Saturn's Luminosity and Magnetism.
D. J. Stevenson and D. J. STEVENSON (1980)
Science 208, 746-748
   Abstract »    PDF »
Saturn's Magnetosphere, Rings, and Inner Satellites.
J. A. VAN ALLEN, M. F. THOMSEN, B. A. RANDALL, R. L. RAIRDEN, and C. L. GROSSKREUTZ (1980)
Science 207, 415-421
   Abstract »    PDF »
Vertical Structure of the Ionosphere and Upper Neutral Atmosphere of Saturn from the Pioneer Radio Occultation.
A. J. KLIORE, G. F. LINDAL, I. R. PATEL, D. N. SWEETNAM, H. B. HOTZ, and T. R. MCDONOUGH (1980)
Science 207, 446-449
   Abstract »    PDF »
Pioneer Saturn Celestial Mechanics Experiment.
J. D. ANDERSON, G. W. NULL, E. D. BILLER, S. K. WONG, W. B. HUBBARD, and J. J. MACFARLANE (1980)
Science 207, 449-453
   Abstract »    PDF »


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