Sh2-155 Cave Nebula in Hubble Palette (JohnAdastra)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: PK110+01.1 · Sh2-155 · VdB155

Powered byPixInsight

Sh2-155 Cave Nebula in Hubble Palette

Powered byPixInsight

Sh2-155 Cave Nebula in Hubble Palette

Subframes were done in SHO colors using PixInsight's Weighted Batch PreProcessing script, integrating lights and flat from two separate nights. During processing the Ha channel was worked over with Deconvolution, MLT noise reduction, HDRM Multiscale Transform, Local Histogram Equalization, Histogram Transformation and Morphological Transformation on the stars to create a refined luminance master frame. SII, Ha and OIII were forged into a color master with Channel Combination and which was subsequently processed with StarNet to create a starless image. All color adjustments such as Curves Transformation and Color Saturation were conducted or the starless image. The luminance layer with stars was then superimposed over SHO color frame using LRGBCombination (L-channel only) to create the final master light. While not perfectly free of residual star artifacts, color processing a starless image seems a bit easier than the route where Morphological Transformation is used with stars present and adjusting for colored star halos must be done later.

Northeast Imagers
LVAAS Astroimaging
Narrowband imaging
Suburban Astrophotography
PixInsight Addicts
Light Polluted skies

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	5024929
PixInsight job	FK2AC6FX00N17LIN05OF2MTKN1THSCY8
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h57m31s.52
RA (top/left)	23h05m03s.66
RA (top/right)	23h01m40s.86
RA (bottom/right)	22h49m28s.12
RA (bottom/left)	22h53m41s.11

Dec (center)	+62°35′10″.8
Dec (top/left)	+61°38′33″.6
Dec (top/right)	+63°47′42″.5
Dec (bottom/right)	+63°30′32″.5
Dec (bottom/left)	+61°22′10″.4

Image Index:

Contribution Index (beta):

Sh2-155 Cave Nebula in Hubble Palette

Sh2-155 Cave Nebula in Hubble Palette

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Sh2-155 Cave Nebula in Hubble Palette

Sh2-155 Cave Nebula in Hubble Palette

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