Observation by Mike Greenhill-Hooper: IC 1805 Heart Nebula (part of!)

Uploaded by

Mike Greenhill-Hooper

Observer

Mike Greenhill-Hooper

Observed

2025 Dec 13 - 18:30

Uploaded

2026 Jan 16 - 14:26

Objects

The Heart Nebula (IC1805)

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Constellation

Cassiopeia

Field centre

RA: 02^h32^m
Dec: +61°25'
Position angle: +26°14'

Field size

1°54' × 1°10'

Equipment

90mm f/6 TS triplet with 0.8FR on NEQ6 mount
ASI294MMPro with LRGB filters

Exposure

15x120s for each filter; camera gain 121, offset 10, T=-10C

Location

Miradoux, S.W. France

Target name

IC 1805, Heart Nebula

Title

IC 1805 Heart Nebula (part of!)

About this image

Battling against dew and fog, just managed to capture some images. Half-way through imaging session I had to dismantle parts of the equipment and give it a blast with the hair dryer. On re-assembling I didn't have time to properly align the camera and so the subsequent GB frames were slightly rotated from the LR frame positions. Consequently I had to significantly crop the final image. Images treated with Cosmic Clarity Satellite trail removal programme, then the LRGB master images were created with Affinity Photo, with calibration (darks, flats, dark flats) and alignment. Next I performed gradient correction and de-noising with GraXpert of the LRGB master images. Following that stacking and colour image generation with Siril was followed by Colour Calibration and star removal (Sriril / StarNet). Finally I worked on the starless and starmask images with Affinity Photo and recombined them. Final sharpening and noise reduction with Cosmic Clarity.

Files associated with this observation

IC1805 M GREENHILL-HOOPER.jpg (752.6 kB)

Like this image

Dominic Ford, Duncan Hale-Sutton, Callum Potter, Andy Wilson

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