LDN1235 - Dark Shark Nebula (Widefield) (Joe Santacroce)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 16 Cep · 24 Cep · 31 Cep · HD208002 · HD208509 · HD209258 · HD209610 · HD210369 · HD210476 · HD210511 · HD210615 · HD210806 · HD210873 · HD210902 · HD211300 · HD211771 · HD211879 · HD212955 · HD213021 · HD214511 · HD214710 · HD215038 · HD215174 · HD216327 · HD216368 · LBN 535 · LBN 541 · LBN 546 · LBN 558 · LDN 1235 · And 7 more.

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LDN1235 - Dark Shark Nebula (Widefield)

Powered byPixInsight

LDN1235 - Dark Shark Nebula (Widefield)

LDN1235 - Dark Shark Nebula

LDN 1235 or the Dark Shark Nebula is a beautiful dark nebula in the constellation of Cepheus which resembles our favourite ocean predator. It is comprised of dark dust which is faintly illuminated by the surrounding stars and is thus very difficult to image.

A dark nebula or absorption nebula is a type of interstellar cloud, particularly molecular clouds, that is so dense that it obscures the visible wavelengths of light from objects behind it, such as background stars and emission or reflection nebulae. The extinction of the light is caused by interstellar dust grains located in the coldest, densest parts of molecular clouds. Clusters and large complexes of dark nebulae are associated with Giant Molecular Clouds. Isolated small dark nebulae are called Bok globules. Like other interstellar dust or material, things it obscures are only visible using radio waves in radio astronomy or infrared in infrared astronomy. Wikipedia

Taken With:
Samyang 135mm with ASI533MC-Pro Camera
ZWO 30mm Guide with ASI120mm Mini
Optlong L-Pro Filter
Skywatcher HEQ5 Pro Mount
ASIAir Pro

Processed in Pixinsight and Photoshop
113 x 120s
30 x 300s
Total Integration: 6 hours 16 minutes

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
Image of the day
Top picks
Top pick nominations

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
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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.
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	6466502
PixInsight job	987L5H6XPIKXB60IG2HODBL47DRZG7U1
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h16m26s.93
RA (top/left)	22h45m25s.83
RA (top/right)	21h33m14s.48
RA (bottom/right)	21h55m36s.59
RA (bottom/left)	22h51m38s.52

Dec (center)	+73°33′12″.6
Dec (top/left)	+76°14′32″.8
Dec (top/right)	+75°03′56″.1
Dec (bottom/right)	+70°40′52″.3
Dec (bottom/left)	+71°35′18″.5

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LDN1235 - Dark Shark Nebula (Widefield)

LDN1235 - Dark Shark Nebula (Widefield)

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LDN1235 - Dark Shark Nebula (Widefield)

LDN1235 - Dark Shark Nebula (Widefield)

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