139p 20171114 kshima

139P/Vaisala-Oterma 139P will travel its perihelion 3.41AU on Dec. 10, its absolute magnitude is 11 so that the comet will not become brighter than now as referring Yoshida-sanís homepage. A short tail can be seen south-west toward. I measure its magnitude as m1=18.5 by Astrometrica (UCAC-4). 2017.11.14.61193UT, 9*60s, 45cm F4.6 Refletor, FLI ML8300, 2 bin, 1/2 crop, taken at Fujimi-machi, Nagano, Japan by Kunihiro Shima.

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