Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB (Steve Milne)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Horsehead nebula · IC 434 · NGC 2023

Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB, Steve Milne

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Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB

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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.

B

Description: Regained some star colour. A little extra saturation.

Uploaded: ...

C

Description: Dialled back Alnitak a little

Uploaded: ...

D

Description: That glow from the blue star on the right was annoying me, so I cropped it out. I also thought the image might have become a bit too 'saturated', so I went back to a less vivid version.

Uploaded: ...

F

Description: A bit more contrast in the Ha regions (following suggestion from Olly Penrice)

Uploaded: ...

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Status	Basic success
Started	...
Astrometry.net job	2024882
PixInsight job	n/a
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Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB

Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB

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Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB

Horsehead Nebula (Barnard 33) and NGC 2023 in Orion – HaLRGB

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