Celestial hemisphere:  Southern  ·  Constellation: Corona Australis (CrA)  ·  Contains:  IC 4812  ·  NGC 6726  ·  NGC 6727  ·  NGC 6729
NGC 6726 at 2500mm focal length in LRGB, Paul Muller
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NGC 6726 at 2500mm focal length in LRGB

Revision title: Supersaturated

NGC 6726 at 2500mm focal length in LRGB, Paul Muller
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NGC 6726 at 2500mm focal length in LRGB

Revision title: Supersaturated

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Description

Having spent my first two years in the hobby working from my Bortle 9 "interrogation lamp" quality skies, I've never even dreamt of wasting my time with attempting to shoot a reflection nebular let alone a dark nebula - under my skies, well it wouldn't be that dark...

Now that I've managed to setup a remote observatory I've had a crack at braving the the still quite turbulent jet stream to try my hand at an object that captures the extremes of both and there's so much going on here it's hard to keep track of it all.

First up the pair of NGC 6726 and NGC 6727 are bright stars lurking in a dusty cloud situated in Corona Australis. The curved streak near the reflection nebulae is partly obscured by dust and needs level infrared detectors to see through the muck, which is hiding R CrA, a young star just 500 light years distant which is in the process of accreting interstellar material. 

IC 4812 - is a double star BSO 14 (WD 1450+432), discovered and catalogued in Australia in the 1820s

Beneath NGC 6726 is the glowing NGC 6729 (BN - Variable Nebula) reflection/emission nebula roughly 424 light-years away. It was discovered by Johann Friedrich Julius Schmidt in 1861.This fan-shaped nebula opens from the star R Coronae Australis toward the star T CrA to the south-east. R CrA is a pre-main-sequence star in the Corona Australis molecular complex, one of the closer star-forming regions of the galaxy.

Finally the dark horse of the show, Bernes 157 is a dark nebula 520 light years distant in Corona Australis, so dense that it obliterates the background stars. 

Something that I had never known about, contained within the image and the Herbig–Haro objects. Herbig–Haro objects (HH) – after astronomers George Herbig and Guillermo Haro – are narrow jets of gas and matter ejected by young stars at speeds of 100 to 1000 kilometers per second that collide with the surrounding nebula, producing bright shock fronts that glow as the gas is heated by friction while the surrounding gas is excited by the high-energy radiation of nearby hot stars. These objects are transient phenomena, lasting not more than a few thousand years. HH 82, 96, 97, 98, 99, 100,101, 104 are all high-speed jets of material that travel away from the baby stars at velocities close to a million kilometres per hour, slamming into the surrounding gas creating shock waves in turn causing the gas to shine and create the glowing shapes you can see.

I am sure with stiller air and slightly better collimation I can do better, but for now I'm pretty pleased with the results of my first dark+reflection nebula.

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  • NGC 6726 at 2500mm focal length in LRGB, Paul Muller
    Original
  • Final
    NGC 6726 at 2500mm focal length in LRGB, Paul Muller
    B

B

Title: Supersaturated

Description: Because I can't stop messing with things, I had a play with increasing the saturation to see what other data may have been hiding in the background. Would love ot know what y'all think

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NGC 6726 at 2500mm focal length in LRGB, Paul Muller