Cave Nebula Sh2-155 (Carlos Uriarte)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 527 · LBN 529 · Sh2-155

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Cave Nebula Sh2-155

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Cave Nebula Sh2-155

Cave Nebula, a beautiful nebula in Cepheus. About 2,400 light-years away along the Milky Way. Studies reveal that the nebula has formed on the border of the Cepheus B molecular cloud and the young, hot, blue stars of the Cepheus OB 3 association. The bright edge of ionized hydrogen gas feeds on radiation from hot stars , especially of the blue star of type O that is seen on the center of the image. These radiation-driven ionization fronts are causing the nuclei to collapse and the formation of new stars within them. The cosmic cave is more than 10 light-years in diameter, an appropriate size for a good batch of new stars.

Acquisition data:

Telescope: Takahashi FSQ106 F5

Mount: Paramount ME

CCD: Atik 460 EX MONO

Guided: Lodestar X2 + EZG60

Observatory: UriarteRuiz in Àger (name to be baptized)

Place: Àger (La Noguera)

Dates: 24, 25 and 26 August 2020

Filters LRGBHa Astrodon L 25 x 600 "R 25 x 300" G 25 x 300 "B 40 x 300" H 45 x 900 "Total: 22.9h of exposure. Flats, darks and bias

Processed with Pixinsight 1.8. 6 and Photoshop CC 2020

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	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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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
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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	3818776
PixInsight job	YRP98JPWSNE07RIJE6T160E6EHMRUJHQ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h57m04s.93
RA (top/left)	22h57m32s.75
RA (top/right)	22h50m10s.96
RA (bottom/right)	22h56m39s.19
RA (bottom/left)	23h03m55s.20

Dec (center)	+62°36′46″.8
Dec (top/left)	+63°25′06″.5
Dec (top/right)	+62°46′15″.0
Dec (bottom/right)	+61°48′23″.8
Dec (bottom/left)	+62°25′59″.9

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Cave Nebula Sh2-155

Cave Nebula Sh2-155

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Image Index:

Contribution Index (beta):

Cave Nebula Sh2-155

Cave Nebula Sh2-155

Equipment

Acquisition details

Description

Comments

Sky plot

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