IC 4812 & NGC 6726/27 (Los_Calvos)

Celestial hemisphere: Southern · Constellation: Corona Australis (CrA) · Contains: IC 4812 · NGC 6723 · NGC 6726 · NGC 6727 · NGC 6729

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IC 4812 & NGC 6726/27

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IC 4812 & NGC 6726/27

This time, we turned to a more well-known region that we find beautiful and very varied:

At 424 light years, within the limits of the constellation of Sagittarius and at the edge of the Southern Crown is the molecular cloud of Corona Australis, in which we find several magnificent nebulae by reflection (dust clouds reflecting the light of neighboring stars) and several dark nebulae (clouds of gas and dust that do not receive not enough light from any nearby star and present themselves as dark and mask the stars behind).

NGC 6726/6727 and IC 4812 are blue reflection nebulae, NGC 6729 is a butterfly-shaped object acting in emission/reflection around an irregular variable star R Coronae Australis (R CrA) discovered in 1866 with a magnitude varying from 9.7 to 13.5. This star is so hot that it causes the ionization of the gas present which therefore emits light. Be 157 original is a little and faint reflexion nebula.

There are also herbig-haro objects, the most visible of which in the image are HH98,99, 100, 101 and 104. These are small clouds associated with some very young stars, which form when matter ejected by these nascent stars collides with the surrounding clouds of gas and dust, at speeds of several hundred kilometers per second. Herbig-Haro objects are ubiquitous in regions of stellar formation, and often it is possible to observe several around the same star, aligned along its axis of rotation.

They are seen as delicate little arcs of luminous gas. All in a set of dark nebulae: SL 39, SL 41, Be 158 and part of the large Be 157. In addition, in the top right corner shines the globular cluster NGC 6723 of magnitude 6 to 6.8 of class VII consisting of stars of magnitude 14 and less.

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	Distinct awarded users	Total awarded images
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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.
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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	...
PixInsight job	A42RGKW8WZZJ4G0XUIBIYTJH7S69QJ1G
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h01m17s.755
RA (top/left)	19h03m16s.895
RA (top/right)	18h59m23s.690
RA (bottom/right)	18h59m17s.443
RA (bottom/left)	19h03m13s.874

Dec (center)	-36°55′25″.26
Dec (top/left)	-36°32′35″.40
Dec (top/right)	-36°31′45″.21
Dec (bottom/right)	-37°18′07″.37
Dec (bottom/left)	-37°19′01″.55

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IC 4812 & NGC 6726/27

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