Celestial hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle nebula  ·  M 16  ·  NGC 6611
M16 in nautical dark, Benjamin Olry
M16 in nautical dark
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M16 in nautical dark

M16 in nautical dark, Benjamin Olry
M16 in nautical dark
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M16 in nautical dark

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Description

I live in Bonn - Germany and from mid May to mid August we only get nautical darkness. This limits my ability to shoot milky way core targets severely but after I found a paper that analyses the spectra of the different twilights I thought I'd give the ha filter a chance.

https://www.nature.com/articles/srep26756/figures/1

I added some rgb osc stars and used the ha data for luminance, star shapes and parts of the red channel. CS!

5 hours for narrowband and 0.5 hours for starcolors rgb

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M16 in nautical dark, Benjamin Olry