The Rosette in Ha

[roundycat]

I have 150m of O3 and 100m of x2 binned S2 to go with this but the first attempt to put it all together didn't impress me much. All taken last night from 19:30 to 04:30 after wasting 45m on the Cone in O3 and coming up with zilch. Such was the quality of the sky I even went through the nightmare of pier flipping which inevitably left me with some subs that didn't line up properly, hence the square crop. (also the TMB and STL do not suit each other without a huge and expensive flattener). This one is a bit contrasty, I am thinking of doing the S2 and O3 separately and sticking them together in PS for a Hubble blend.

This was STL11000M, TMB 152 on the AP1200 guided by Atik16/FSQ. Astronomik nb filters. 15m subs for Ha and O3, 10m for the binned S2. I never normally bin but as S2 is so weak normally I made an exception. Using the TMB I was getting an image scale of 1.5"/pix as against 3.3 if I used the FSQ and cropped the image. As the seeing was 1-2" last night I figured it wouldn't cost me too much to bin one channel.

Dennis

[Ford Prefect]

Fantastic image Dennis, great detail one of the best ive seen