M29 in RGB (David McClain)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: M 29 · NGC 6913 · The star 40Cyg

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M29 in RGB

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M29 in RGB

I don't know why, but the first time I saw this little cluster in the telescope eyepiece, just south of Gamma Cyg, it just grabbed me forever after. A little "H" in the sky. So tonight I grabbed a copy with my C8 HyperStar camera.

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Revision improves color content and more gracefully mitigates field stars without eroding the central character of this image.

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Revise with improved field star mitigation.

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Whole new approach, using super-pixel deBayering, drizzled integration, synthetic luminance, linear space field star erosion, and then stretching to nonlinear space.

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Rev G: Improved field star reduction. The goal is not so much as to remove field stars, as to make them less obtrusive. A variation on my original technique now applies a star mask in the linear image, erodes a 5x5 morphological kernel, then remove mask and apply mild sharpening with LMRT, enhancing layer with scale length 2 by a modest amount (e.g. 0.5). Then the image is stretched (dynamic range compressed) with MS to visible range.

The mild sharpening applied after morphological erosion brings back the faint field stars a bit, with considerably less prevalence in the image, but makes for a more honest and pleasing image.

To avoid undue noise amplification during the sharpening, TGV denoising is applied prior to erosion and sharpening, in the linear image.

All processing takes place on a drizzle integrated image, then downsampled by 2x for final presentation. The image was super-pixel deBayered. This is in keeping with the actual spatial resolution of the CFA camera.

Can you spot the planetary nebula at the East side?

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	1291613
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M29 in RGB

M29 in RGB

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Image Index:

Contribution Index (beta):

M29 in RGB

M29 in RGB

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

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