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Galileo NIMS Direct Observations of the SL-9 Fireballs

Show simple item record Carlson, R. W. en_US Weissman, P. R. Hui, J. Segura, M. Johnson, T. V. Smythe, W. D. Baines, K. H. Drossart, P. Encrenaz, T. Leader, F. Mehlman, R. 2004-10-01T21:44:59Z 2004-10-01T21:44:59Z 1995-05
dc.identifier.citation European Geophysical Society, Hamburg, Germany, May 1995 en_US
dc.identifier.clearanceno 95-0398
dc.description.abstract The Galileo spacecraft was situated 1.8 AU from Jupiter, at a phase angle of 51 deg, providing a direct view of the impacts of the comet fragments with the planet. Low resolution infrared spectra in the 1 to 5 micron range were recorded for several of the events, which can be used to study the early evolution of the fireballs. Preliminary analysis of the data received for the G event show an initial fireball temperature of greater than 5000 K and an effective source diameter of less than 10 km. These spectra show absorption by molecular hydrogen and methane which place the upper emitting surface in the stratosphere, above the ammonia cloud level. As time progresses, the fireball cools and the effective diameter of the radiating area increases at roughly 2 km/sec. In 30 seconds, the fireball cools to approximately 1000 k and exhibits a diameter of about 100 km. en_US
dc.format.extent 27526 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other NIMS en_US
dc.title Galileo NIMS Direct Observations of the SL-9 Fireballs en_US

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