Facts
The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.
Date: 14.09.2014
Location: Backyard, Asker, NO
Camera: SBIG STT-8300 Mono CCD
Optics: Celestron SCT 8″
2000mm f10
Exposure: LRGB (L=7x180sec + 11x300sec 2x2binned, RGB=14x180sec 3x3binned)
Guiding: MaximDL, SBIG Selfguiding FW
Post processing: MaximDL, Photoshop CS5
Comments: The first photo after the summer. 70% moon.
Håvard's Observatory 