NGC 7023

About image
NGC 7023, also called Iris Nebula, is a diffuse nebula visible in the Cepheus constellation.
NGC 7023 is a reflection nebula, that is it reflects the light of some nearby stars; probably the main star responsible for its lighting is just the star of seventh magnitude, cataloged as HD 200775, which would be enveloped by the nebula, along with other less bright stars born from its powders and that form an open cluster.
The nebula is about 1400 light years from Earth.

Technical data
Optic            Tecnosky Apo Refractor 115 - 800mm f/6.9
Mount          Losmandy G11 with Ovision worm and FS2
Camera           Atik 4000 with Starlight Xpress filter wheel 5 positions
Filters        Baader LRGB 50.8 unmounted
Guiding system      TSOAG 9mm with Lodestar
Exposure details    L 22x480" bin1 -15C
                                      R 7x300" bin2 -15C
                                      G 7x300" bin2 -15C
                                      B 7x300" bin2 -15C
Total integration    4.7h
Acquisition        Maxim, PHD2
Processing        Maxim, Photoshop CS5
SQM-L         21.30    
Location         Pian dell'Armà (Pavia, Italy)
Date             5 August 2013
© Roberto Marinoni 2019 - All rights reserved