Observation by David Davies: The Medusa Nebula

Uploaded by

David Davies

Observer

David Davies

Observed

2022 Feb 22 - 23:00

Uploaded

2022 Feb 23 - 17:11

Objects

Abell 21

Equipment

8-inch RC telescope
ASI294 MC Pro camera
SW EQ8 mount

Exposure

70 x 2 min

Location

Cambridge, UK

Target name

Abell 21, The Medusa Nebula

Title

The Medusa Nebula

About this image

Tuesday 22nd February was a remarkably clear night right up to the Moon rising around 1 am. I spent the evening exploring several objects using my new AS294 camera and finding its sensitivity and speed intoxicating to use. The camera brings faint subjects into view with just a few relatively short exposures, Something of contrast compared to my QSI 683 mono.

For the time being, I've settled on 2-minute exposures at unity gain (120 on the camera) to keep the majority of stars from saturating so that I can still capture something of their colour - I think my mono QSI CCD camera did do a better job of this.

I've stretched this image more than I would normally to try and bring out something of the very faint nebulosity to the right - there is just a suspicion of it. The white dwarf star at the centre is clearly visible and shows pale blue.

Files associated with this observation

Abell21_GESD_highstretch_PS-web.jpg (1.4 MB)

Like this image

Simon Paul Davis, David Basey, Alan Thomas, Martin Lewis, Graham Winstanley, Paul Whitmarsh

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