The Bubble Nebula

Always a favourite, here’s a narrowband view of the Bubble Nebula, NGC7635 in Cassiopeia, captured on 27 October. 8 x 10 min of H-alpha and OIII, and 7 x 10min of SII were taken with the Atik 314L+ through my Equinox ED80 with SkyWatcher field flattener. The colour mapping is R = H, G = (2S+H)/3, B=O. There is some OIII and SII present near the bubble itself!

HmixO

A Bubble In The Sky

The image below shows NGC7635 in Cassiopeia, also known as the Bubble Nebula – for obvious reasons!

This image was captured over two nights with an Atik 314L+ through an MN190, using H-alpha and OIII filters. 28 x 2min exposures were taken through each filter, and then combined with the H-alpha assigned to the red channel, and the OIII to the green and blue channels.

Cassiopeia

Taken tonight, this is a shot of a region close to the Cassiopeia – Cepheus border. The open cluster M52 is visible at the top of the image, then directly below it is the Bubble Nebula, NGC7635. Below and to the right is the bright nebula NGC7538, while the patch of nebulosity in the lower left of the image is part of the nebula Sh2-157. Taken on the Atik 314L+ with a H-alpha filter and a Canon 200mm f2.8L lens, it’s comprised of 27 x 3 min exposures.

The Bubble Nebula

As a second attempt at narrowband imaging I had a go at the Bubble Nebula, NGC7635, which is located in Cassiopoeia, close to the border with Cepheus. For this shot through the LX200R with f/6.3 focal reducer, I took 4 x 10min frames using Ha, OIII and SII filters, then combined them all with red=Ha, green=SII and blue=OIII. The nebula clearly emits principally at the Ha wavelength, but there is some presence of both OIII and SII visible as well.