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Light variations of Periodic Comet Halley beyond 7 AU (1985)

Sekanina, Z.

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Publication Date: 2011-08-19

Description: The present examination of brightness data on the Periodic Comet Halley over the October 1982-February 1984 period, for evidence concerning nucleus rotation period and projected cross section area, notes variations of up to 5:1 in intrinsic brightness. Application of a period-determination technique has failed to yield a clear choice for the true rotation period among a large number of peaks in the spectrum, some of which virtually coincide with the sun's rotation period and its submultiples. It is found that rotation periods longer than about 1 day are the most likely; it is suggested that the observed light curve is a composition of periodic and erratic variations.

Keywords: ASTROPHYSICS

Type: Astronomy and Astrophysics (ISSN 0004-6361); 148; 2, Ju; 299-308

Format: text

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