The Crescent Nebual NGC6888 (John Kulin)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888

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The Crescent Nebual NGC6888

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The Crescent Nebual NGC6888

I started this on the 30th May 2020 and it wasn't until the 20th July that I finished grabbing all the subs.

I did capture some SII, but some how it didn't look right, maybe I need to have a longer play with it, so this is HOO with RGB for the stars.

I have quite enjoyed working on this as the NB part needed hardly any playing with curves.

With my Bortle 5 / bordering on 6 skies, I don't think it has come out too bad.

Here's the Bumf: -

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000[3] to 400,000[citation needed] years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favourable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".

Moravian Users
Ritchey Chretien telescopes GSO Family

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Status	Basic success
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Astrometry.net job	4044743
PixInsight job	n/a
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The Crescent Nebual NGC6888

The Crescent Nebual NGC6888

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The Crescent Nebual NGC6888

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