I can’t let winter go past without having a go at the Rosette Nebula, so before the clouds rolled in last night, I was able to grab a few frames. 12 x 10min Ha and 8 x 3min R, G and B, all binned 2 x 2. It’s just a shade too big for a 500mm scope with this camera…
Also from 6th February is the Rosette Nebula in Monoceros. The first view of it is a narrowband image taken through the ED80 with the Atik One, from 10 x 5min with each of Hα, OIII and SII filters, put together using the Hubble palette of R=SII, G=Hα and B=OIII.
For the second view, this image was combined with an LRGB image taken by Andrew Luck. Andrew’s original image can be found here. The combined image nicely shows off some of the detail within the nebula.
Although the moon was full last night, the first decent clear night we’ve had for a long time was something I just couldn’t resist. So I put a Hα filter on my Atik 314L+ and connected it to the Equinox ED80. It was quite windy to start off with, so I only set it to capture 2 minute exposures, to reduce the risk of losing a lot of subs. Approximately two and a half hours worth of photons later, this was the result:
The image below shows NGC2239, the open cluster found at the centre of the Rosette Nebula. Luminance frames – 24 x 5 min through an H-alpha filter – were combined with 10 x 2 min R, G and B frames to provide some colour. All were acquired with the Atik 314L+ camera through the MN190 reflector. Some slight trailing is evident, despite autoguiding, and I need to try and track down the cause!
I then swung the telescope round to Leo, in the area just below Regulus which was rising in the East. There’s a collection of three Messier galaxies, M95, M96 and M105 just around there, along with a coule of slightly smaller objects from the NGC catalogue, 3371 and 3373. Despite this being a stack of 36 x 3min frames at ISO800 through the ED80, there’s still an awful lot of noise in the image, possibly because of how low down in the sky the region was while I was shooting. The galaxies are also pretty small, and will benefit from getting a longer focal length ‘scope on them.
Before I started off I was a bit sceptical about how much of the H-alpha I’d be able to get, but all things considered, I’m reasonably pleased with the result. As ever, a few more frames wouldn’t hurt, though!
I had a little bit of time left towards the end of the evening, so took 10 x 3min frames of M35, a bright open cluster in Gemini. A smaller cluster, NGC 2158, is visible south-east of M35.