Hi Guys
Late last night patchy clouds came in so I dumped the usual long exposure pain, and took this pic through sucker holes with short exposures. I only got 1 hr total in before shut down, at about 2am.
Its very small, but also bright, especially OIII, huge ADUs with just 2 min subs
. I was suprised, I dont think ive ever got away with 2 min NB subs on anything !.
Anyway, this is 4 off 10min 3nm Ha subs, 6 off 2 min OIII and 2 off 5min SII (both 6 nm). Mapped as LRGB (hubble), all at bin 1 . SII was a joke, almost nothing.
I was lucky enough to find a bright enough guide star to fire up AO8 guiding at 2hz. The guide star was mag 10, 0.25sec exposures is unusual for this mag (I think), so the seeing must have been quite good, despite the full moon and bright clouds everywhere.
Guideing error was about 0.2 arc/secs RMS although the pk/pk could have been 1 arc/secs or more.
The Saturn neb is some 16 arc/secs in diameter, about 25 pixels at my image scale and FL(0.68 arc secs), so this image is VERY cropped, the raw subs were fairly blocky before processing, hence the focus doesnt look very flash at all
.
Anyway, given the FOV it came out OK I think, AO saved my ass here from a even more blurry mess
.
Also on my
site at a slightly higher res.