Object  M42- The Great Orion Nebula

M42 is located in the well known constellation of Orion. This Nebula is really part of a much larger nebula  known as the Orion Molecular Cloud Complex. The Orion Molecular Cloud Complex extends throughout the constellation of Orion and includes Barnard's Loop, the Horsehead Nebula, M43, M78 and the Flame Nebula. Stars are forming throughout the Orion Nebula, and due to this heat-intensive process the region is particularly prominent in the infrared. The red hue is well-understood to be caused by recombination line radiation at a wavelength of 656.3 nm. The blue-violet coloration is the reflected radiation from the massive O-class stars at the core of the nebula.

Date Lum-19 & 27/ 11 & RGB 28/ 12/ 10
Location BayTop Observatory- Streaky Bay South Australia
Instrument Home built 10" Newtonian (Bob Royce primary) and an Antares 1/20th wave secondary with Televue Paracorr coma corrector. System working @ f4.6 (native F4/ 1016 FL)  1.315 arcsec/pixel- FOV  44.6x44.6
Mount Celestron CI700 controlled by the SiTech servo Goto Control System with Pittman 8000 series motors. Pulley and belt system
Camera (CCD) Starlight Xpress SXVR-H16 monochrome with Starlight Xpress USB filter wheel.
Exposures L: 40Ha: 88' R:32G:32B:32' [4' sub exposures all unbinned]   No bias or flat fields taken.
Guiding  ST80 refractor F5 with a Starlight Xpress HX516 CCD. Mounted via a side by side accessory plate.                    
Filters Astronomik typeII anti halo Ha (12nM) LRGB 2" filter set
Notes/ Conditions

Notes- The Luminance  was combined with Ha via layering and the Red channel has had Ha added to it.