NGC7635, Bubble Nebula

[HotBlack]

This is my first excursion into narrowband imaging, albeit only a Ha addition for a luminance layer in Photoshop.

Details are,

Modified Canon EOS 300D with Astronomic CLS clip filter, William Optics 80II FD refractor.

Colour data taken on 11th October between 21:45 and 22:32 BST

10 x 240 sec exposures, calibrated with darks, flats and flat darks.

Ha data taken on 12th October between 21:54 and 22:40 BST

10 x 240 sec exposures, calibrated with darks, flats and flat darks.

Each nights data stacked with DSS. Post processed in Photoshop CS2. Ha data grayscaled and layered over colour data as luminance layer at 60% opacity.

The image presented here is a crop of the centre of the frame, which also included M52 and NGC7538.

I've also put up a scan of a visual observation I made of this in 1992 using an 8.5" Newtonian. Compares pretty well with the image.

Chris

[BlueAstra]

Nice photo with lots of good observation data. The data is useful to us beginners as a guide.