Early recovery of Comet 55 P / Tempel - Tuttle ?
نویسندگان
چکیده
We present recovery observations of the parent of the Leonid meteor stream – comet 55P/Tempel-Tuttle using the Keck II telescope. At recovery, the comet was at r = 4.5 AU, with m R = 22.6, and there was no indication of coma or activity. Pre-and post-recovery observations from 6 observing runs (1994–1997 June) are presented. From these measurements we estimate that the nucleus radius is R N = 1.8±0.2 km with a nucleus axis ratio greater than 1.5. As of 6/97 (r = 3.5 AU), the comet activity had not yet started.
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