Comet Jacques in Cassiopeia (Tony Cook)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas)

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Comet Jacques in Cassiopeia

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Comet Jacques in Cassiopeia

Comet 2014 E2 (Jaques) in northern Cassiopeia

A full tutorial for the processing method is presented here

The tricky part was preserving the faint ion tail when performing the "Star Freeze" processing - I seem to have managed it!

Version B: Colour balanced and bright star colour enhancement.

Note: even though the background was correctly balanced to a neutral colour (dark grey) the stars where too yellow and comet was too green. In particular the ion tail colour wasn't blue enough and we know comet ion tails are blue due to CO+ ions. The correction method used Photoshop levels with corrections to the gamma settings in the red and blue channels to neutralise the green/yellow cast. The background was rebalanced back to neutral grey by adjusting the black points in the red and blue channels to compensate the gamma adjustments

Original
Final
B

Comets Imaging
Cloudy Nights

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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	632168
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Comet Jacques in Cassiopeia

Comet Jacques in Cassiopeia

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Image Index:

Contribution Index (beta):

Comet Jacques in Cassiopeia

Comet Jacques in Cassiopeia

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

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