The Iris Nebula ( NGC 7023) is a reflection nebula where dust in our galaxy is being illuminated by a hot blue star at the centre of the image. It is approximately 1,300 light-years away and six light-years across.
Acquisition: William Optics GT81, WO Flat 6AIII 0.8x reducer, ZWO ASI1600MM-Cool, Atik EFW2, Astronomik L, R, G, B 1.25″
Mount/Guiding: Orion ST80, QHY 5, PHD2, Sky-Watcher NEQ6, EQMod, Sequence Generator Pro
Processing: PixInsight 1.8
Dates: September 20th – 22nd 2020
Lights: L 330 x 60s, R 97 x 60s, G 99 x 60s, B 107 x 60s, Unity Gain, -15C, Total Exposure 10.55 hours
Flats: 30 per filter