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The brightness variations of Comet Halley at large heliocentric distancesThe reasons for the intrinsic brightness variations of up to 500 percent on time scales as short as a few hours detected by Sekanina (1984) in Comet Halley between October 1982 and February 1984 are discussed. It is shown that solar wind-modulated electrostatic dust blowoff from the night side of the comet is consistent with the observed brightness variations. The variations coincide with the encounter of high-speed streams with the comet. The stream's propagation time to the comet and the sun's rotation during this transit were used to locate the stream origin on the coronal surface, and the results are shown.
Document ID
19870024680
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Flammer, K. R.
(California Univ. La Jolla, CA, United States)
Jackson, B.
(California Univ. La Jolla, CA, United States)
Houpis, H. L. F.
(California Univ. La Jolla, CA, United States)
Mendis, D. A.
(California, University La Jolla, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Astrophysics
Accession Number
87A11954
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-16065
CONTRACT_GRANT: NSF AST-83-03105
CONTRACT_GRANT: NGR-05-009-110
Distribution Limits
Public
Copyright
Other

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