Observation by Mike Greenhill-Hooper: Orion's belt and sword with 135mm l...

Uploaded by

Mike Greenhill-Hooper

Observer

Mike Greenhill-Hooper

Observed

2026 Jan 23 - 18:30

Uploaded

2026 Jan 31 - 13:43

Objects

The Orion Nebula (M42)
The Running Man (NGC1977)
The Horsehead Nebula (Barnard 33)
The Flame Nebula (NGC2024)

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Constellation

Orion

Field centre

RA: 05^h37^m
Dec: -03°37'
Position angle: -78°59'

Field size

7°42' × 5°03'

Equipment

135mm Samyang lens (f/4) on ASI294MMPro all on SkyWatcher NEQ6

Exposure

10x25s for each (RGB) filter; gain 121, offset 10, T=-10C

Location

Miradoux, SW France

Target name

Orion's belt and sword

Title

Orion's belt and sword with 135mm lens

About this image

The first glimpse of clear skies for weeks, but just 1.5 hours before high clouds rolled in, which affected green and especially blue images. Images treated to remove satellite trails with Seti Astro's satellite trail removal program. Next images calibrated (darks, flats, dark flats) and stacked with Affinity Photo. Deconvolution with Siril, gradient removal and denoise with GraXpert, then RGB stack created and Starnet star removal conducted in Siril to produce star and starless mask. These were then treated separately with Affinity Photo and recombined. Final use of Seti Astro's Cosmic Clarity and Denoise programs.

Files associated with this observation

Orion 135mm M Greenhill-Hooper 2.jpg (1.2 MB)

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