An atmosphere on Ganymede from its occultation of SAO 186800 on 7 June 1972

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Title:	An atmosphere on Ganymede from its occultation of SAO 186800 on 7 June 1972
Authors:	Carlson, R. W Bhattacharyya, J. C Smith, B. A Johnson, T. V Hidayat, B Smith, S. A Taylor, G. E O'Leary, B Brinkmann, R. T
Issue Date:	Sep-1973
Publisher:	The American Association for the Advancement of Science
Citation:	Science, Vol. 182, No. 4107, pp. 53 - 55
Abstract:	On 7 June 1972 the third Jovian satellite Ganymede occulted the eighth-magnitude star SAO 186800. Successful photoelectric observations obtained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt immersions and emersions, indicating the presence of an atmosphere whose surface pressure is greater than about 10/Sup-3 millibar. By fitting the two occultation durations as chords to a model disk, the diameter is found to be 5270 (+30, -~ 200) kilometers, the major error contribution arising from the uncertain atmospheric thickness below the occultation layer. The derived mean density is 2.0 (-0.03, + ~ 0.2) grams per cubic centimeter.
Description:	Restricted Access
URI:	http://hdl.handle.net/2248/4602
ISSN:	0036-8075
Appears in Collections:	IIAP Publications J.C.Bhattacharyya (1982 - 1990)

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