NGC 7023 Iris Nebula LHaRGB

Here is a close-up of NGC 7023, the famous Iris Nebula, which I had never had the opportunity to image before.
It is a reflection nebula located about 1300 light years away in the constellation Cepheus.
Although the dominant color that we generally find in the images of this nebula is blue, characteristic of dust grains reflecting the light of the stars, the close-up view and the poses through the hydrogen filter allowed to emphasize the glow red characteristic of hydrogen gas excited by the young central star with intense radiation.
Dark, obscuring clouds of cold molecular dust and gas are also present.
22h30 of shots in September and October 2020 in Amiens, France (Bortle 7 sky) with:
– Ritchey Chretien 200mm f / 8 telescope (focal length: 1624mm)
– Avalon Linear mount
– 163mm QHY Camera + LRVBH Astrodon filters

Autore: Guinot (sito)