03 Sep 2010
Object name: CTB1
Apparent RA:  Apparent Dec:
Constellation: Cassiopeia

A very difficult region containing the CTB1 supernova remnant along with a number of small hydrogen alpha regions, some of which are listed in the Sharpless catalogue including Sh-165 and sh-166. The contrast between the stars and the bubble shaped remnant is very small - ideally this region needs better skies in conjunction with a 3nm filter instead of my wider 6nm filter. I've used data from two nights to complete this image, and discarded a number of brighter frames. Aggressive processing is required to highlight the bubble structure.

View full sized image of CTB1

Captured in ArtemisCapture, calibrated in ImagetoolsCa, combined in maxim, thuggery in photoshop. Total integration time 9.75 hours

This image was autoguided using my homemade off axis guider and my black and white SC1 webcam.

Imaged with my homemade telescope mount

Exposure Details :

Astrodon 6nm Ha 20x900s on 57mm @ F5 with ART285
Astrodon 6nm Ha 22x900s on 57mm @ F5 with ART285

Curdridge Observatory, Southampton,UK