The Ghost of Cassiopeia (IC 63) (JohnEEvans)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 59 · IC 63 · The star Navi (γCas)

The Ghost of Cassiopeia (IC 63), JohnEEvans

Powered byPixInsight

The Ghost of Cassiopeia (IC 63)

Powered byPixInsight

The Ghost of Cassiopeia (IC 63)

The Ghost of Cassiopeia in SHO.

Dust clouds in the constellation Cassiopeia are illuminated by the large and very bright star, Gamma Cas. The Ghost of Cassiopeia (IC 63) appears from behind a wall (IC 59).

IC 63 is about 550 light-years away. The radiation from Gamma Cas causes a strong emission signal in Ha from the illuminated dust. There are also reflection signals.

The image was captured on one night in the SHO palette with dithering. Processed in PixInsight as follows:
1. Each filter was stacked with drizzle, cropped, ezDenoise and DBE.
2. Combined in SHO and stretched.
3. Removed stars with StarNet and de-emphasised with ezStarReduction.
4. Extracted L, R, G and B and removed Gamma Cas halos with GameMask and HistogramTransformation.
5. Sharpened L with LocalHistogramEqualisation and HDRMultiscaleTransform.
6. Recombined R, G and B are adjusted colours, saturation, etc.
7. LRGBCombination and added stars with PixelMath.
8. Gamma Cas. I had a very difficult time trying to improve this. In the end I removed some artefacts with CloneStamp and convolved it. I'm sure there will be better ways of dealing with this.

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	Basic success
Started	...
Astrometry.net job	5103873
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

The Ghost of Cassiopeia (IC 63)

The Ghost of Cassiopeia (IC 63)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

The Ghost of Cassiopeia (IC 63)

The Ghost of Cassiopeia (IC 63)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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