Markarian's Chain (Mostly) From Bortle 8 Skies (Jonathan)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: M 84 · M 86 · M 87 · NGC 4374 · NGC 4388 · NGC 4402 · NGC 4406 · NGC 4425 · NGC 4435 · NGC 4438 · NGC 4459 · NGC 4461 · NGC 4473 · NGC 4477 · NGC 4486 · Virgo Galaxy

Markarian's Chain (Mostly) From Bortle 8 Skies, Jonathan

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Markarian's Chain (Mostly) From Bortle 8 Skies

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Markarian's Chain (Mostly) From Bortle 8 Skies

Longer-term project lasting about two months, with most of the rgb data being acquired from my ~bortle 8 backyard and about half of the luminance data coming from bortle 3 dark sky site (though some of that was during ~50% moon)

Processed in Pixinsight with finishing touches in Photoshop.

General processing steps:
WBPP
Luminance:
BlurX (Correct only)
DBE
PSF Image
BlurX sharpen
NoiseX
StarX
Histogram Stretch on starless and stars
Recombine stars with pixelmath

RGB:
BlurX (correct only) on each
ChannelCombination
DBE
SPCC
PSF Image
BlurX sharpen
NoiseX
StarX
Histogram Stretch on starless
Arcsine stretch then Histogram Stretch on stars
Recombine using pixelmath

Combining L and RGB:
Extracted L* from RGB
LinearFit on L* to match L
Re-inserted L* to RGB
LRGBCombination to add L to RGB

ZWO ASI183/QHY183
Central USA
Broadband under Bortle 7/8/9
WO Redcat 51 Group

Redcat51 + ASI183MM 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
Artificial satellite

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

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Markarian's Chain (Mostly) From Bortle 8 Skies

Markarian's Chain (Mostly) From Bortle 8 Skies

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Image Index:

Contribution Index (beta):

Markarian's Chain (Mostly) From Bortle 8 Skies

Markarian's Chain (Mostly) From Bortle 8 Skies

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

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