CTB1 Supernova remnant

CTB1 Supernova remnant

Curdridge Observatory, Southampton,UK
Object name: CTB1 Supernova remnant
Apparent RA: 23 58  Apparent Dec:62 30
Constellation: Cassiopeia
11 Sep 2013
CTB1 is a large but faint supernova remnant in Cassiopeia and has been a favourite target of mine for some years. Finally I've completed a mosaic of the region using the new Astrodon 3nm Hydrogen Alpha filter. This is a very old supernova remnant, around 10,000 years old. Coincidentally it is about 9800 light years away. This area of the sky near CTB1 appears riddled in old SN remnants. Long suspected as a PN and appearing as such in the Abell catalog as Abel 85 it was confirmed as a SNR a few years ago.

The Skywatcher 200 Newtonian telescope on the homemade telescope mount along with the Artemis 285 camera has a FOV of about 30 arc minutes. I've had to do a 2x2 mosaic of the region, and as you can see the CTB1 nebula only just fits on here!

Also known as Abell 85, SNR G116.9+00.1, LBN 576

Data was gather over 6 moon free nights. 4 of these where perfect nights where i collected 20 or so 1200s frames. The other two nights were less good. I'm not certain on the total exposure time, but it is certainly greater than 20 hours.

View full sized image of CTB1 Supernova remnant

cCaptured in maxim and processed in photoshop

This image was autoguided using my homemade off axis guider with Lodestar.

Imaged with my homemade telescope mount

Exposure Details :

Astrodon 3nm Ha Coma Corrector 60x1200s on 200 @ F5 f.l. 1000 with Artemis 285 camera


Skywatcher 200 Newt (upgraded with OO Hilux secondary)
Baader Focuser
Homemade focus motor
Homemade filterwheel / OAG combo with Lodestar guide camera
Artemis 285 CCD camera
Homemade Telescope mount

Curdridge Observatory, Southampton,UK

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