Cygnus Loop (AstroBillUK)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: IC 1340 · NGC 6960 · NGC 6979 · NGC 6992 · NGC 6995 · The star 52 Cyg · Veil Nebula

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Cygnus Loop

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Cygnus Loop

This is most of the Veil Nebula complex, aka Cygnus Loop, imaged as HOO+RGBstars, using67@180s Altair 4nm Ha Oiii filter for the nebula.30@60s Altair LPRO-MAX filter for the starsAltair Hypercam 24CFXon my APM 107/700 scope reduced to 525mm and f/4.9. The moon was over 85% full. I kept about 3h of the Ha Oiii and 1h of the LPRO data after discovering and deleting some cloud-infested subs.I had the new GPCAM3 2210 in the 60mm Altair guide scope with the IR pass filter. All was under the control of the Gaius-S Smartbox running NINA with PHD2 and Hocus Focus. Ioptron GEM 45, ZWO EAF and ATIK filter wheel. Initial stacking was done in Astro Pixel Processor - creating the Ha, Oiii and RGB layers as channels - post processing in Pixinsight (+RC Astro tools, especially StarXTerminator to take the Ha Oiii for just the nebula and RGB for just the stars) with a little Photoshop to tidy up. I drizzled the data in APP with 2x scale and droplet size 2 and Bayer Xtrans drizzle selected. I still don’t quite know what I am doing with drizzling but this seemed to give better results than with smaller droplets, which seemed to leave annular holes around stars. The 4nm filter did a good job of killing a lot of the moon effects, but GradientXterminator in Photoshop helped tidy up the residual gradient in the Oiii layer. No halos on the brightest star from either filter!

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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	8856186
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Cygnus Loop

Cygnus Loop

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Image Index:

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Cygnus Loop

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