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These elongated patches of emission nebulae are designated LBN 278, LBN 301, LBN 310, LBN 313, LBN 325, LBN 326 and LBN 335 in Lynd's Bright Nebulae (LBN) catalog. They are large and extremely faint emission nebulae located in Cygnus, 4.5 degrees straight west of Deneb, the constellation's brightest star. They belong to a huge nebulae complex which also includes the γ Cygni Nebula Region and the NGC 6914 and vdB132 Region to the south. The curved appearance and filamentary structure of these nebulae imply that they were formed by a supernova which may have exploded somewhere to the east (left) of this picture.
The nebulosity emits all of its light in isolated emission lines. The most prominent of those are the Hα, [OIII] and [SII] lines, which were exclusively recorded to obtain the image shown above. This is a "natural color" composition mixed so that the resulting colors are close to the visible spectrum of the human eye. The following mixture was used:
- Red = Hα + 24% [SII]
- Green = [OIII]
- Blue = [OIII] + 15% Hα to compensate for missing Hβ
This mixture is proposed by J-P Metsavainio and Richard Crisp.
LBN 310 and Surrounding Nebulosity, Wide Field, telelens photograph.
LBN 310 and Surrounding Nebulosity in Hα, which is part of this image.
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© 2019 Walter Koprolin