2P/Encke with FSQ-106ED October 26, 2013UTC by hirocun on Flickr.
I found an image of the comet with lovely tail taken by a Japanese astroimager in Kumamoto 19:46UTC October 21, 2013, and I confirmed it. The green halo was wider in North East, and the tail was toward North West. North is up, and East is to the left.
Here is an inverted and enhanced image. The length of the tail was about 14 arcminutes.
This 1,862 x 1,222 - pixel frame is cropped of full 5,634 x 3,753 - pixel frame. If I use a scope with focal length about 1.6m, I may be able to take a frame of this scale without cropping.
equipment: Takahashi FSQ-106ED and Canon EOS 5Dmk2-sp2, modified by Seo san on Takahashi EM-200 temma 2 jr. equatorial mount, autoguided at the center of the coma with parallel-mounted Takahashi FS-60C, Starlightxpress Lodestar Autoguider, and PHD guiding
exposure: 2 times 360 seconds and 4 times 240 seconds at ISO 800 and f/5.0
The first exposure started at 19:22:30UTC, and the last at 19:48:15UTC October 26, 2013
Twilight began at 19:30UTC at the site in the morning.
Moon with 45% illumination was in the sky, 50 degrees above the frame.
site: 1,002m above sea level at lat. 37 21 05 N. and long. 140 42 53 E. in Abukuma, Fukushima, about 30km from Fukushima Daiichi Nuclear Plant
Wind was strong just after the passage of typhoon Francisco, 27th one of the year.
Ambient temperature was around 5 degrees Celsius.