M51 (Kevin Morefield)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 51 · NGC 5194 · NGC 5195 · Whirlpool galaxy

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M51

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M51

I struggled to get both the fainter details to show without noise while at the same time getting the brighter parts to retain detail and sharpening. So I ended up using a subset of the sharpest Luminance and color subs to create a sharp Synthetic Luminance. I processed that in CCDStack with all of the color data I had which was bin 1x1. This "sharp" version was sharpened in CCDStack an had a limited stretch. Then I restacked all of the data, fuzzy subs and all, and stretched this more aggressively.

Moving to Photoshop, the more stretched version received a Topaz Denoise and then the brighter parts of the sharp version were layered on the fuzzy one. I then flattened and processed as normal. I should add that when selecting the bright regions from the Sharp version, removed any stars with ringing artifacts from the sharpening process.

Total dataset: 34 Luminance, 18 Red, 29 Green, 16 Blue, and 12 Ha. All 15 minute subs.

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 failed
Started	...
Astrometry.net job	1574928
PixInsight job	TJWAHUAGSNULLUJEHYSDEQBOEAPU8K7Q
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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M51

M51

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Image Index:

Contribution Index (beta):

M51

M51

Equipment

Acquisition details

Description

Comments

Acquired at

Sky plot

Histogram

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