Click here for a 45% resolution image (1.1 Mb)

 

 

 

The Details
Object
NGC 6726/IC 4812/NGC 6723 in Corona Australis
Optics
Astro-Physics 12" Mak-Cass f/8
Platform
Astro-Physics 1600 Mount with absolute encoders
Camera
FLI 16803 Proline CCD
Filters
Tru-Balance LRGB Gen 2 filter set
Date
19/21/22 May 2015
Location
Las Campanas Observatory, Chile
Exposure
L 8 x 600 sec, 1x1 bin; RGB 6 x 600 sec, 1x1 bin
Software
ACP, Maxim DL/CCD, CCDStack 2, Photoshop CS5
Orientation
Field of view: 52' x 52' centered on RA 19h00m46s
DEC-36°49'03" (2000). North angle 359.7°; east 90° CCW from north
Notes
This image shows a portion of the Corona Australis (CrA) Molecular Cloud, a complex region of about 50 solar masses of molecular gas stretching tens of light years across and only 430 light-years from Earth, making it one of the closest star forming regions to us. 

The dark cloud dominating the lower half of the image is known as Bernes 157.  Embedded within it are reflection nebulae NGC 6726/6727 (upper bluish nebula) and IC 4812 (lower bluish nebula).  At a 7 o’clock position from NGC 6726/6727 is a whitish patch designated NGC 6729.  Just to the right of it is a comma-shaped object, Bernes 158, a Herbig-Hero structure in which protostellar systems are currently evolving.  In the upper right quadrant is the beautiful southern globular cluster NGC 6723, lying much further away at over 28,000 light-years.  Finally, at lower right is the bright star Epsilon Coronae Australis.

The constellation Corona Australis, or Southern Crown, lying south of the Sagittarius Teapot and east of the Scorpion’s tail, is made up of an asterism of 4th and 5th magnitude stars in the shape of a horseshoe.

 

 

 

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