2019 Jan. 6 (4 comets)
I observed 4 comets visually on Jan. 6 in Mt. Tsukuba, Ibaraki, Japan.
11.6 mag Dia. 2.4' DC 1 (40.0-cm reflector 75x)
I could see Iwamoto's comet for the first time, since I
missed his past two comets C/2013 E2 and C/2018 V1.
Diffuse, very weakly condensed.
10.5 mag Dia. 3' DC 6-7 (40.0-cm reflector 75x)
5.5 mag Dia. 26' DC 2 (10x70 monocular)
It became faint.
13.6 mag Dia. 0.6' DC 5 (40.0-cm reflector 144x)
It became brighter than expected. Well condensed.