Here's the one we've been waiting for. NGC 2467.
Big image here.
15 hours per channel in Ha, OIII, SII.
Ten hours per channel in 1 hr subs spread over 2013, 2014, 2016, and 5 more hours per channel in 15 minute subs over this and the previous new moon.
We've mapped the star colours to white. South is up, so you can see Snoopy.
It's only an incremental improvement, but we're quite pleased.
There is precious little SII (red) in this nebula. It has taken 15 hours of exposure to really show it convincingly. It is mostly in the "cross-bones" (Snoopy's bathing cap), the coat-hanger, the "beach ball" (large hollow structure surrounding an open cluster half-way to 6 o'clock) and in a very small, more intense hollow structure surrounding a single bright star in the centre of the image. SII tends to be associated with supernova remnants, and the lack of it suggests that not so very much SNR activity has occurred here as yet.
Best,
Mike and Trish