M57
;Data;
Telescope; Celestron EdgeHD800 (F=10,2000mm)
Camera; SBIG: STL-11000M ( Ha, G,B)
Mount; Takahashi EM-200 Temma2,Self--guiding
Exposure; L=5min X8, Ha=15minX4, G=5minX1, B=5minX1 ( Total; 110min)
Soft-ware; Stelaimage7, PhotoshopCC
Date; 14/May 2018
Tempature; -15 degree
Taken by koji matsumoto