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Gerhard Bachmayer | all galleries >> AstroPhotos >> Astrophotos 2008-2018 > The Butterfly Nebula ( IC1318) in Cygnus
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The Butterfly Nebula ( IC1318) in Cygnus

The Butterfly Nebula ( IC1318) in Cygnus

IC1318 is part of a hugh emission nebula surrounding Gamma Cygni ( the bright star on the right), the heart of Cygnus.
The image is a composite of three seperate captures made of the emission lines of hydrogen (Ha, 656.3nm), oxygen (OIII,495.9nm and 500.7nm), and sulfur (SII,671.9nm and 673.0nm), were SII:Ha:OIII has been mapped to R:G:B.

Telescope: ASA 10N-OK3 f3,6
Mount: Astrotec OTE150
Guider: Starlight XPress Loadstar
Camera: FLI PL16803
Filter-wheel: FLI CW 5-7
Filter: FLI Ha - 8nm, OIII - 8nm, SII - 8nm
Exposure: Ha:9x600sec, OIII:7x900sec, SII:8x900sec
Programs: Maxim DL 5.0, CCDStack 1.37, PixInsight SE 1.2, Photoshop CS2 full exif

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