Padraic M Posted July 22, 2021 Share Posted July 22, 2021 This is NGC7023 aka the Iris Nebula, a bright reflection nebula in Cepheus. NGC7023 refers to the open cluster inside the nebula. The entire is also known as Caldwell 4. Imaging is a total of 3 hours RGB, with a small amount of Luminance added, captured from Bortle 2 Kerry Dark Sky Reserve on 20th July but unfortunately with no astro darkness. Imaging: Esprit 80, ASI160MM Pro @ -20C, gain 139, Baader RGB filters. Guiding: Starwave 50mm, ASI290mm Mini, HEQ5 Pro belt mod. Capture control: NINA, PHD2, SharpCap PA. Processing: APP, Gimp, Noise Ninja. 6 Quote Link to comment Share on other sites More sharing options...
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