object: 109P/1992 S2 Swift-Tuttle (1992t) date of obs: Dec 15 1992 8:48-8:56 UT place of obs: Yamanashi Japan telescope: hypabolic astrograph 160-mm f/3.3 (Takahashi epsilon 160) camera: Nikon film: hypered TP2415 observer: Shigeru Kotajima remarks: