Sh2-155 / Cave Nebula, wide field; Ha-RGB (Rodolphe Goldsztejn)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD216102 · HD216380 · HD216425 · HD216532 · HD216629 · HD216658 · HD216711 · HD216898 · HD216926 · HD217035 · HD217061 · HD217086 · HD217099 · HD217297 · HD217312 · HD217463 · HD217657 · HD217730 · HD217872 · HD217919 · HD217966 · HD217979 · HD218066 · HD218139 · LBN 521 · LBN 524 · LBN 527 · LBN 529 · LDN 1215 · LDN 1216 · And 6 more.

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Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

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Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

Cette "grotte" cosmique abrite une pouponnière d'étoiles de 10 années-lumière de profondeur !
Le bord plus billant de l'entrée de la "grotte" est dû au rayonnement des étoiles chaudes dont celle se situant juste à l'entrée.

This cosmic "cave" shelters a nursery of stars 10 light-years deep!
The more billowing edge of the entrance of the "cave" is due to the radiation of hot stars, including the one located just at the entrance.

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Description: Final processing with Luminar AI instead of Lightroom

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Title: Starless processed in Linear mode

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Title: Less dramatic, more natural colors

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Title: Bad weather project: reprocessing and learning

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Title: Horrendous weather project - reprocessing...

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Title: Yet another interpretation

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
Image of the day
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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
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
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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.
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	7329872
PixInsight job	PF98PJ6FDIJSC8N8RH263DUCEC5FVNVM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h56m55s.32
RA (top/left)	22h48m08s.42
RA (top/right)	22h49m08s.65
RA (bottom/right)	23h04m54s.70
RA (bottom/left)	23h05m30s.46

Dec (center)	+62°36′45″.3
Dec (top/left)	+64°01′07″.4
Dec (top/right)	+61°09′38″.4
Dec (bottom/right)	+61°10′32″.5
Dec (bottom/left)	+64°02′06″.7

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Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

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Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

Sh2-155 / Cave Nebula, wide field; Ha-RGB

Revision title: Less dramatic, more natural colors

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