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dc.contributor.authorKnight, Matthew M.
dc.contributor.authorFarnham, Tony L.
dc.contributor.authorSchleicher, David G.
dc.contributor.authorSchwieterman, Edward W.
dc.date.accessioned2014-10-14T19:48:42Z
dc.date.available2014-10-14T19:48:42Z
dc.date.issued2010-12-06
dc.identifier.citationKnight, M. M., Farnham, T. L., Schleicher, D. G., & Schwieterman, E. W. (2011). The increasing rotation period of comet 10P/Tempel 2. Astronomical Journal, 141(1)en_US
dc.identifier.urihttp://hdl.handle.net/11141/367
dc.description.abstractWe imaged comet 10P/Tempel 2 on 32 nights from 1999 April through 2000 March. R-band light curves were obtained on 11 of these nights from 1999 April through 1999 June, prior to both the onset of significant coma activity and perihelion. Phasing of the data yields a double-peaked light curve and indicates a nucleus rotational period of 8.941 ± 0.002 hr with a peak-to-peak amplitude of ∼0.75 mag. Our data are sufficient to rule out all other possible double-peaked solutions as well as the single- and triple-peaked solutions. This rotation period agrees with one of five possible solutions found in post-perihelion data from 1994 by Mueller and Ferrin (Icarus, 123, 463-477) and unambiguously eliminates their remaining four solutions. We applied our same techniques to published light curves from 1988 which were obtained at an equivalent orbital position and viewing geometry as in 1999.We found a rotation period of 8.932 ± 0.001 hr in 1988, consistent with the findings of previous authors and incompatible with our 1999 solution. This reveals that Tempel 2 spun-down by ∼32 s between 1988 and 1999 (two intervening perihelion passages). If the spin-down is due to a systematic torque, then the rotation period prior to perihelion during the 2010 apparition is expected to be an additional 32 s longer than in 1999.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. Copyright Law.en_US
dc.rights.urihttp://aas.org/publications/aas-copyright-policyen_US
dc.titleThe increasing rotation period of comet 10P/Tempel 2en_US
dc.typeArticleen_US
dc.identifier.doi10.1088/0004-6256/141/1/2


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