Sh2-170 Little Rosette nebula in Cassiopeia (Alastairmk)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas)

Sh2-170 Little Rosette nebula in Cassiopeia, Alastairmk

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Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

Powered byPixInsight

Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

Sh2-170 "Little Rosette" is a nice emission nebula in Cassiopeia, shown here in SHO with RGB stars. This image is a 'filler' usually taken at the end of the night after the main target had sunk below the trees. Subframes acquired over 13 nights from mid-November 2022 until early January 2023. After some ruthless culling of inadequate subs, the SHO integration time was 21.5 hours of 480s exposures with around two hours of RGB at 60s.

Processing in Pixinsight with WBPP followed by NormalizeScale Gradient and two DBE runs on each narrowband master to remove sky gradients. Remaining processing kept simple with RGB combination, followed by BlurXTerminator, StarXTerminator to produce a starless image and then NoiseXterminator. Most difficult stage was multiple GeneralizedHyperbolicStretch steps to produce a stretched image. Further noise reduction with TGVDenoise, added in RGB stars which had gone through a similar process that included GHS stretches , a final TGV run and some tweaking to darken the background with CurvesTransformation.

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Title: S2-170 Little Rosette Nebula

Description: Decided to try and sharpen the jpeg version with Topaz Denoise AI and it was indeed sharpened. The most AI I have ever applied to an image.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Basic success
Started	...
Astrometry.net job	8348201
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

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Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

Sh2-170 Little Rosette nebula in Cassiopeia

Revision title: S2-170 Little Rosette Nebula

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