The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south of Orion’s Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 light years and is the closest region of massive star formation to Earth.
This is about 7h total exposure with Hydrogen alpha and Oxygen III filters (Astrodon 5nm) with 40x 300″ subs and HDR bicolor processing.
Ritchey Chretien 12″ w/ APM Riccardi .75x reducer
KAI4022 CCD sensor @-18°C
Visit hi-res image on Astrobin.com
|Telescope||RC12" GSO Carboon|
|Focal lenght||reduced 1862mm f/6|
|Integration||Ha 40*300" + OIII 39*300"|
|Coordinates||RA 05h35m15s.4 - DEC -05°24′03″|
|Field size||18′x18′ - 0.82"/pix|
|Shooting date||21 and 23 Dec 2022|