NGC 2244

• Photographer : Hyunwoo Kim

• DATE : 17, 25, 26 Dec 2021

• Place : Cheorwon, (Bortle 4), Gimpo (Bortle 5)

• Telescope : SDT80 (FL 384mm/F4.8)

• Tripod & Mount : IEQ45

• Guide scope/camera : ZWO mini guide scope / ASI 120mm mini

• Camera : 1600mm pro (-20 deg)

• Filter : Optolong HSO

• Exposure : Total 8.45 hours

Optolong Ha filter : 180s x 61 (gain 200)

Optolong S2 filter : 180s x 13, 300s x 5 (gain 200)

Optolong O3 filter : 180s x 72 (gain 200)

• Software : Pixinsight