Cygnus Wall (Gary Lopez)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B355

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Cygnus Wall

Link: https://www.garylopezphotography.com

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Cygnus Wall

Link: https://www.garylopezphotography.com

The Cygnus Wall is a ridge of star-forming gas and dust about 20 million light-years long in the North American Nebula, NGC 7000. Like a mountain range carved by the erosion of water and wind, the Cygnus Wall is shaped by the energetic radiation of the young, hot stars nearby. The dark shapes that snake through the ridge are cooled gases and dust, the birth place of new stars.

The data for this image were collected in only two sessions. While the nights were clear, the atmosphere was variable, leading to a collection of light subs with HFR’s ranging from a low of 1.78 to a high of 4.67. I assembled the subs in the categories according to the emission spectra (Ha, OIII, and SII) and their HFR, and processed each category separately. I created a master luminance using Ha and SII (which had the best structure signals) using only subs with an HFR of <2.3 and a concomitant star count. Version A is a nearly full acquisition frame and a processing approach intended to enhance 3-D depth. Version C is a tighter, more compositionally balanced crop with more subdued, less saturated colors. I can't decide with I prefer.

This is one of my favorite DSO's with its craggy spine and the dusty veil sweeping across the middle of the ridge. I really like the pronounced three-dimensionality of this object created by the juxtaposition of shadow and color caused by the layers of gases. For me its appearance marks the beginning of the summer astro season.

ZWO ASI1600MM/QHY163M
Suburban Astrophotography
SF Bay Area Imagers

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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
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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 success
Started	...
Astrometry.net job	2798440
PixInsight job	A7N0HOPOGSVI8TZQXXKF3MJIYTVYHJPQ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h59m14s.661
RA (top/left)	21h00m52s.698
RA (top/right)	20h56m36s.173
RA (bottom/right)	20h57m38s.484
RA (bottom/left)	21h01m50s.700

Dec (center)	+43°40′19″.51
Dec (top/left)	+44°14′49″.62
Dec (top/right)	+44°06′31″.64
Dec (bottom/right)	+43°05′44″.82
Dec (bottom/left)	+43°13′55″.59

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