C9 (SH2-155) The Cave Nebula (Steve Argereow)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD216629 · HD216658 · HD216711 · HD216898 · HD217035 · HD217061 · HD217086 · HD217099 · HD217312 · HD217463 · LBN 524 · LBN 527 · LBN 529 · Sh2-155

Powered byPixInsight

C9 (SH2-155) The Cave Nebula

Powered byPixInsight

C9 (SH2-155) The Cave Nebula

Sh2-155 (also designated Caldwell 9, Sharpless 155 or S155) is a diffuse nebula in the constellation
Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is
widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula
in Cepheus. Sh2-155 is an ionized HII Region with ongoing star formation activity, at an estimated
distance of (2400 light-years) from Earth.

Information Credits: Wikipedia

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI6200MC-Pro Temp -10C, Binning 1 x 1, Gain 100 Offset 50
ZWO EFW

23 X 180 Second Exposures W/Optolong L-Extreme Filter (6nm)
53 X 240 Second Exposures W/Optolong L-Extreme Filter (6nm)
12 X 300 Second Exposures W/Optolong L-Extreme Filter (6nm)
30 Dark Frames/40 Flats
Total Integration Time: 5 Hours 41 Minutes
Acquisition with SharpCap
Stacked with Astro Pixel Processor
Stacked with Deep Sky Stacker
Stacked with AutoStakkert
Guiding PHD2
Processed with Astra Image
Photo taken from Seven Lakes, NC Bortle 4.5

AstroBin Platform open discussions community forum
Optolong L-eXtreme filter
ZWO ASI 2600MC PRO

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
Solar system
Extremely wide field
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.
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	6386542
PixInsight job	TO7P3E0JIQOBCZGUWXYBNJC4ZHI35QNV
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h56m50s.55
RA (top/left)	22h52m25s.29
RA (top/right)	22h52m54s.85
RA (bottom/right)	23h01m06s.42
RA (bottom/left)	23h00m55s.67

Dec (center)	+62°36′43″.3
Dec (top/left)	+63°09′06″.6
Dec (top/right)	+62°01′52″.4
Dec (bottom/right)	+62°03′49″.3
Dec (bottom/left)	+63°11′08″.1

Image Index:

Contribution Index (beta):

C9 (SH2-155) The Cave Nebula

C9 (SH2-155) The Cave Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

C9 (SH2-155) The Cave Nebula

C9 (SH2-155) The Cave Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information