The Coal Sack (Steve de Lisle)

Celestial hemisphere: Southern · Constellation: Crux (Cru) · Contains: 256 Cru · 35 Cru · 39 Cru · Acrux · Becrux · Crux · Gacrux · Jewel Box · Mimosa (βCru) · NGC 4439 · NGC 4463 · NGC 4609 · NGC 4755 · NGC 4815 · NGC 4852 · PK300+00.1 · PK300-00.1 · PK300-01.1 · PK300-02.1 · PK300-02.2 · PK301-01.1 · PK302+02.1 · PK302-00.1 · PK302-00.2 · PK304+05.1 · PK304+05.2 · PK305+01.1 · PK305+03.1 · PK305-00.1 · PK305-03.1 · And 22 more.

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The Coal Sack

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The Coal Sack

Quick image of the Coal Sack nebula which is a rather large dark nebula situated next to Acrux. Aboriginal astronomers referred to it as the head of the Emu, and when you see it with the naked eye, it is easy to see why. I must admit, I tend to ignore it. However, I was at a dark sky site (my farm) and since I had my stock Canon 7D mark II camera, Samyang f2.0 135mm lens, and an Ioptron Sky Tracker with me, I decided to image it before the moon came up. Considering the limitations of the equipment, I thought it was OK, so here it is.

Astronomical Society of Victoria (ASV)

Nebulae
Widefield

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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
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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
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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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	Advanced success
Started	...
Astrometry.net job	5520986
PixInsight job	0W5UV7SYSMJT50U9D7ZFWQM8HKMMC7U1
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h54m34s.90
RA (top/left)	12h30m29s.60
RA (top/right)	12h22m13s.16
RA (bottom/right)	13h27m37s.28
RA (bottom/left)	13h18m06s.89

Dec (center)	-61°23′14″.10
Dec (top/left)	-56°19′00″.4
Dec (top/right)	-66°09′15″.8
Dec (bottom/right)	-66°06′01″.3
Dec (bottom/left)	-56°16′16″.3

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