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M20 Trifid
Barry Brook is a University professor from Tasmania, Australia. He does astronomy from his 'Huon Ridge Observatory' in the dark southern skies lat 43S. He's had a life-long interest in astronomy, forged from his teen years in the 1980s when he was lucky enough to live on site at Siding Spring Observatory Australia's largest professional optical observatory where his Dad worked as an engineer. After years as a visual-only enthusiast, he has recently developed a passion for astrophotography. With endless wonderful southern-sky targets to capture, he'll be kept busy for many years!
Date Taken: 09/02/2014
Photographer: Barry Brook
Location: Adelaide, Australia
Telescope: Orion ED80T CF Triplet Apochromatic Refractor Telescope
Mount: Orion Thin Off-Axis Guider for Astrophotography
Other Mount: AZ-EQ6
Camera: Orion StarShoot G3 Deep Space Monochrome Imaging Camera
Other Camera: ZWO ASI120MM-S guide camera
Processing: Startools, Nebulosity, DeepSkyStacker
Exposure: 18x600 sec Ha, 224x300 sec LRGB
Other Equipment Used: Tele Vue 0.8x FF/FR
Notes: A fairly long integration of the reflection blue and emission red nebula of M20, the fabulous 'Trifid Nebula'. This is a large HII region in Sagittarius, located about 5,200 light years away. The image was captured a few months ago from my Adelaide surburban backyard, using an Orion ED80T CT apo astrograph at f/4.8, mounted on an AZ-EQ6. The CCD camera was an Orion StarShoot G3 mono, guided with PHD2 using an Orion thin OAG and an ASI120MM-S guide camera. The image is composed of the following: Lum = 56 x 5 min Ha = 18 x 10 min R, G

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