Hubble Space Telescope Observations of t
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P.L. Lamy; I. Toth; M.F. A'Hearn; H.A. Weaver; P.R. Weissman
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Article
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2001
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Elsevier Science
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English
β 155 KB
The nucleus of Comet 9P/Tempel 1, the target of the Deep Impact mission, was detected during Hubble Space Telescope observations taken with the wide-field planetary camera 2 (WFPC2) on 31 December 1997 when the comet's solar phase angle was 3. β’ 8, its heliocentric distance was 4.48 AU, and its geoc