Shark Nebula - LDN 1235 (Michael Shapiro)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 16 Cep · 24 Cep · 78 Dra · HD208509 · HD210369 · HD210511 · HD210615 · HD210806 · HD210873 · HD211300 · HD211771 · HD211879 · LBN 535 · LBN 541 · LBN 546 · LDN 1235 · The star 16 Cep · The star 24 Cep · VdB149

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Shark Nebula - LDN 1235

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Shark Nebula - LDN 1235

Located about 650 light years away in the constellation Cepheus, LDN 1235 is a dark nebula, which bears an uncanny resemblance to a giant shark. As such, It is a large area of dark dust which obscures much of the light from the stars beyond. Located within LDN 1235 are two bright reflection nebulae, vdB 149 and 150, at the top and bottom of the shark. To the upper right, is a distant galaxy PGC 67671.

Given my Bortle 8 skies, is definitely one of the most difficult targets I've imaged. The image is a compilation of about 34 hours of data shot at F2 using the Celestron RASA 8, Celestron LP filter and ASI 294 MC Pro.

Calibrated, stacked and processed in Astropixel Processor and Photoshop.

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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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Top picks
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Distribution of subject types

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
Deep sky
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Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
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.
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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	6104348
PixInsight job	GBGI6A7QWGMV0NFOL17QFCC8V52QVC6N
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h03m11s.63
RA (top/left)	22h26m39s.89
RA (top/right)	21h43m19s.49
RA (bottom/right)	21h42m05s.78
RA (bottom/left)	22h20m18s.57

Dec (center)	+73°11′26″.1
Dec (top/left)	+74°01′57″.2
Dec (top/right)	+74°25′53″.3
Dec (bottom/right)	+72°11′56″.6
Dec (bottom/left)	+71°50′53″.8

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Shark Nebula - LDN 1235

Shark Nebula - LDN 1235

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Shark Nebula - LDN 1235

Shark Nebula - LDN 1235

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