[gregbradley]

Originally Posted by Atmos

The bubble itself looks nice and clean... Many of the stars look a bit funky. There are a couple down towards the bottom of the image that have blue/yellowish rings around them (think Saturn kind of rings).
Not sure what's causing it, artefact of different seeing conditions between LRGB and narrowband?

Probably an imperfect star mask fit on the O3. I fixed an imperfect star mask for the Ha that was making dark halos around a lot of stars. I saw a few minor star defects and didn't think they were that bad but yeah I should tweak that O3 star mask a bit more.

Originally Posted by E_ri_k

Hey Greg, nice image! I like the halo too. It's a shame you couldn't fit it all in on the sensor, although I like the framing. Nice detail and colour.
Erik

Thanks Erik. The small size of the 694 sensor meant it won't all fit. I can swap over to the 16803 and then it would be too large! 16803 would frame it all easily. Next year. I just got my 694 perfectly tilt free so I am scared to touch it!

Originally Posted by Placidus

Hi, Greg,

Very sharp and clean as usual. Lovely job.

Like us, you found an almost perfect match between the distributions of the H-alpha and [OIII]. (There are just a couple tiny patches where the relative contribution of H-alpha is a bit higher than elsewhere)

Perhaps an error in the mask. I should check that.

That is encouraging from the scientific accuracy point of view, but also interesting in that it seems almost unique up there. We could have fun trying to guess why. Gives the image a very special and unusual look, like an ice sculpture.

Cheers,
MnT

It looks a lot like someone blowing a soap bubble with the Porpoise type snout at one end (not fully shown in my image). I tried to make the O3 more teal rather than straight blue. There is a lot of detail in the O3 subs that did not quite make it through in the final image. I should post the O3 by itself and you can see. It shows lots of filaments and strands.

Originally Posted by Bassnut

Thats excellent Greg, a cracker!. Smooth and detailed. I dont know why, but I laughed when I saw the large size, it was quite suprise, right out of left field and very impressive.

Thanks Fred. Its quite an impressive object and not often imaged. I am glad I was able to find it after trying for about an hour simply to locate it!
The little Trius is really super sensitive in O3 so that is one reason I wanted to have a go at it.

Greg.