Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB
This was imaged from my home observatory in the UK using a Skywatcher Esprit 120 and a QSI 690 camera. Data collection began on 2 January 2017. However, I was unable to complete it that season. The final subs were obtained on 9 February 2018. As usual, I would have preferred more data but Orion is already fairly low in my UK sky and I decided to call it a day.
Ha: 24 x 1200s
Lum: 24 x 300s
Red: 17 x 300s
Green: 19 x 300s
Blue: 19 x 300s
A total exposure time of 14 hours and 35 minute.
The Horsehead Nebula is a dark nebula located approximately 1,400 light years away in the constellation of Orion. It is located just south of the 1.7 magnitude star, Alnitak. My framing excluded Alnitak. Nevertheless, it still makes its presence felt on the left side of the frame.
NGC 2023 is a reflection nebula around 1,470 light years from Earth. It provides a pleasing colour contrast from the 'wall' of Ha.
Horsehead nebulaHorseheadnebuladark nebulaemission nebulaBarnard 33B 33B33NGC 2023NGC2023constellationOrionAlnitakHeaven and Earth - Astrophotography and Landscapes by Steve Milne, from