217P/2009 F3＜LINEAR 彗星＞

＊　Discovery　＊ M. Blythe reported the discovery of a comet on four images obtained with the 1.0-m reflector of the Lincoln Near Earth Asteroid Research (LINEAR) program (New Mexico, USA) on 2001 July 11. The earliest of these images was obtained on July 11.22, while the latest was obtained on July 11.25. The magnitude was variously given as 16.7 to 17.7 during this period. It was quickly realized that the comet had already been detected by LINEAR on June 21, June 24, and July 10. For the first June date, the nuclear magnitude was given as 17.6-17.9.

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