NGC7293 – Helix (2017/09/20)

Date:                   09/20/2017~09/23/2017
Location:            Calstar 2017
Condition:          Good to excellent seeing, light dew most nights

Exposure:           Ha – 23x1200s , O3 – 21x1200s, S2 – 10x1200s
Telescope:          Astronomics AT111EDT
Mount:                AP1100
CCD:                    SBIG STF8300M + Baader LRGBHaO3S2 filter

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