Contains: NGC 6726, NGC 6723

Image of the day 08/20/2017

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Corona Australis Nebula and globular cluster NGC 6723 (Version A contains the full image)

Technical card

Imaging telescope or lens: FSQ-106ED

Imaging camera: QHY CCD QHY16200A

Mount: Astro-Physics AP MACH1 GTO

Guiding camera: QHY5L-II mono

Software: Adobe Photoshop CC 2017PixInsight

Filter: Baader LRGB 2" Filters

Accessory: Stardome

Resolution: 1878x1689

Dates: July 23, 2017

Frames: 106x150"

Integration: 4.4 hours

Avg. Moon age: 0.10 days

Avg. Moon phase: 0.01%

Astrometry.net job: 1691575

RA center: 285.467 degrees

DEC center: -37.017 degrees

Pixel scale: 2.324 arcsec/pixel

Orientation: 179.368 degrees

Field radius: 0.815 degrees

Locations: Bellatrix Observatory, Oliveira, Brazil

Description

Version A is the full image.

Version B is a detail showing the central part of the nebula.

The constellation Corona Australis contains one of the closest star-forming regions to the Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. It contains many embedded reflection nebulae,including NGC 6729, NGC 6726–7, and IC 4812. A star-forming region of around 7000 solar masses, it contains Herbig–Haro objects (protostars) and some very young stars. This nebula is one of the closest star-forming regions to the Solar System. The related NGC 6726 and 6727, along with unrelated NGC 6729, were first recorded by Johann Friedrich Julius Schmidt in 1865 (Wikipedia). The globular cluster NGC 6723 is unrelated to the nebula, and is much farther, 28000 light years away. Several galaxies are visible in the background. I have used PixInsight's Local Histogram Equalization. Thanks to J. Barros.

Comments

Author

Luiz Duczmal
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Revisions

B

Version B is a detail of the central part of the nebula. The full image is contained in version A.

Sky plot

Sky plot

Histogram

Corona Australis Nebula and globular cluster NGC 6723  (Version  A contains  the full image), 




    

        Luiz Duczmal