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NGC 7023 - Iris Nebula


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About this observation
John Hughes
Time of observation
21/05/2019 - 23:48
NGC 7023
Observing location
North Essex, UK
William Optics Z103ED
ZWOASI294MC Pro Cooled Camera
Celestron AVX Mount
IDAS D2 LPS Filter
PixInsight & Photoshop
Gain 300, Exposure 180s
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For me, NGC 7023 is situated well for imaging featuring high in the North and rising.

This is a reflection nebula located within the constellation Cepheus. A magnitude +7 star which itself is part of a small star cluster lights up the gas giving it its blue hue. Dust also surrounds the nebula which obscures the light of some of the background stars. 

This image is made up of 20 exposures. I would have liked to have captured more data but unfortunately the clouds drifted into view.

Originally I had a massive circular artefact in the bottom left hand corner which was not removed by my flat frames. My flats were taken the next morning so whatever was on the lens during the session clearly disappeared afterwards. As a result, a synthetic flat was applied which has allowed me to present a wide field image rather than the heavily cropped original.


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