M3 Globular Cluster

8th April 2006
Object name: M3
Popular name:
Object type: Globular Cluster
Classification: VI
Apparent RA: 13 42 11.2 Apparent Dec: +28 22 34
Constellation: Canes Venatici

A bright moon tonight (and a really annoying band of rain) made thing difficult, so I decided, after a bit of target hopping, to try one of the brighter globular clusters, M3, in the hope that it would not be too effected by the moonlight.

Something is amiss with the alignment of the optical components and focus, as the stars have gone a bit wooky in the top left corner. This rather spoils the image - still not bad for a bright moon.

Also, the core, whilst reasonably well resolved, has gone a bit purple!

1x1 Binning for the luminence, and 2x2 binning for the colours.

This image was autoguided using my 400mm focal length refractor and my black and white SC1 webcam.

Captured in Artemis Capture. Calibrated, aligned and combined in Maxim. DDP applied to long L layer. Some filtering in Maxim and tweak curves, resize and save in photoshop. LRGB constructed in photoshop.

Current Imaging equipment configuration

Exposure Details :

Coma Corrector 39x90s on 200mm @ F5 with ART285
Coma Corrector B 15x60s on 200mm @ F5 with ART285
Coma Corrector G 15x60s on 200mm @ F5 with ART285
Coma Corrector R 15x60s on 200mm @ F5 with ART285

Curdridge Observatory, Southampton,UK