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NGC 6337 fairly high resolution, Freestar8n

NGC 6337 fairly high resolution

Getting plate-solving status, please wait...
NGC 6337 fairly high resolution, Freestar8n

NGC 6337 fairly high resolution

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Description

Unusual nebula NGC 6337 in high resolution with EdgeHD11 at f/10 and 0.28" pixels.  This is HaOiii with 21x5m exposures in each channel in one evening of imaging, with all exposures used.  fwhm's range from about 1.3 to 1.8".

There is a good paper on this nebula here.  The odd line on the upper right is mostly Ha emission and apparently corresponds to some kind of cap viewed edge-on.

The Oiii emission is much stronger than Ha, so I scaled it down by a factor of 5 in this blend, so that the Ha filamentary structure is visible.

This nebula benefits from good seeing and small fwhm to reveal the structure.  Otherwise it just looks like its namesake, a Cheerio.

No processing other than levels stretch in photoshop and slight enhancement of colors.

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Histogram

NGC 6337 fairly high resolution, Freestar8n