Crux and the Coal Sack (Michael Watson)

Celestial hemisphere: Southern · Constellation: Crux (Cru) · Contains: Jewel Box · Mimosa (βCru) · NGC 4349 · NGC 4755 · NGC 4852 · Part of the constellation Musca (Mus) · The constellation Crux (Cru) · The star Becrux · The star Gacrux (γCru) · The star α1Cru · The star α2Cru · The star αMus · The star βMus · The star δCru · The star εCru · The star ζCru · The star ιCru · kappa Cru cluster

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Crux and the Coal Sack

Link: https://www.flickr.com/photos/97587627@N06/15790517689/in/set-72157647335374894/

Photographed near Coonabarabran (site of the Anglo-Australian Observatory at Siding Spring, New South Wales, Australia)

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This view centres on perhaps the best-known constellation and star pattern in the southern Sky: Crux, the southern Cross. This region of the sky - through which our Milky Way galaxy passes - is always below the horizon and can never been seen from most of the northern hemisphere.

In this view the four bright stars of the elongated cross appear to the right of centre. The brightest star of the cross is Acrux, toward the bottom and just to the left of centre. To the left of the cross, and just above and to the left of Acrux, is a large, dark, almost star-empty region known as the Coal Sack.

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Nikkor 70-200 mm lens on Nikon D810 camera body, mounted on Sky-Watcher Star Adventurer tracking mount.

155 mm focal length; ISO 2000; four stacked 90-second exposures at f/4.5

Stacked in Registar; processed in Photoshop CS6

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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
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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.

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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	487291
PixInsight job	n/a
PixInsight queue size	n/a
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