121p 20221230 kshima

121P/Shoemaker-Holt

I measured its magnitude m1=20.1 by UCAC-4.

2022.12.30.61021UT, 20*60s, 40cm RC + F6.0 Reducer, FLI ML8300 2 bin, 80% cropping, taken in Nagano Pref., Japan.