Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae (Derek Mellor)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · LBN 533 · LBN 536 · LBN 537 · LBN 540 · LBN 542 · LBN 543 · LBN 544 · LBN 547 · LBN 548 · LBN 549 · LDN 1225 · LDN 1226 · LDN 1227 · LDN 1229 · LDN 1230 · LDN 1231 · M 52 · NGC 7510 · NGC 7538 · NGC 7635 · NGC 7654 · PK110-00.1 · PK112-00.1 · Sh2-157 · Sh2-158 · Sh2-159 · Sh2-161 · Sh2-162

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Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

Powered byPixInsight

Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

I captured this image over 11 clear nights in September - very lucky

. I processed this image using PIP transformations outlined here:

https://thecoldestnights.com/2020/06/pixinsight-dynamic-narrowband-combinations-with-pixelmath/

My full workflow is here:

MureDenoise Ha,OIII,SII

Crop Ha,OIII,SII

Histogram stretch Ha,OIII,SII

Using PixelMath perform the following transformations to create a single RGB image:

R = (Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha

G = ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B = Oiii

EZStarReduction on combined image

Boost contrast, brightness, color balance and saturation using CurvesTransformation

Slight ColorMask boost

Slight sharpen

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	3885729
PixInsight job	4MFC1HZBS96MD1KNLORWUTLEB8S06ZYW
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h18m07s.99
RA (top/left)	23h10m05s.81
RA (top/right)	23h09m30s.43
RA (bottom/right)	23h25m28s.74
RA (bottom/left)	23h27m29s.48

Dec (center)	+60°55′35″.2
Dec (top/left)	+62°19′51″.7
Dec (top/right)	+59°36′36″.8
Dec (bottom/right)	+59°29′46″.3
Dec (bottom/left)	+62°12′29″.1

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Contribution Index (beta):

Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

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Image Index:

Contribution Index (beta):

Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

Sh2-157 and NGC 7635 The Lobster Claw and Bubble Nebulae

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Acquisition details

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Sky plot

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