2017o1 20170918 jchambo

Object/Date:
Comet C/2017 O1 (ASASSN)  @ Sep.18,2017 04:24 UT

Description:
Comet C/2017 O1 ASASSN photographed on September 18th 2017. Comparing this image with I took a month ago is seen as have increased the apparent size of its greenish coma from 7' to 10', and the lenght of its ionic tail from 10' to 20'. Its brightness has slightly increased on same time from magnitude 9 to 8.5 approximately. The brightest star in field is 37 Tauri with magnitude 4,4.

Tech data:
GSO 8" 760mm. f/3.8 & Atik 383L+ (L:3×120s Bin1 + RGB:1x90s Bin2) from Vallés, Valencia (Spain)