Can't remember if I ever posted this image so apologies if you've seen it before. This is a reprocess of the original version.
This field is near iota Centauri and shows the galaxy NGC 5121 and the planetary nebula Longmore 8. There is also an arc of nebulosity to the left of Longmore 8 of uncertain origin which apparently and surprisingly hasn't been noticed before. There are quite a few background galaxies and I think there is some IFN in this field too. Right down at the bottom right there is a funny little bit of nebulosity which I haven't been able to identify. It may be another planetary.
It is a very interesting field Steve, at very first glance that bluish nebulosity has the look of a reflection but it doesn’t look like one at closer inspection at all. The best I can think of could be some larger fainter remnant from the planetary nebula.
Wow..it’s got a bit of everything and beautifully executed. Top job, Steve
Seriously interesting FOV.
Thanks David. I'm surprised it hasn't been imaged more often.
Quote:
Originally Posted by Atmos
It is a very interesting field Steve, at very first glance that bluish nebulosity has the look of a reflection but it doesn’t look like one at closer inspection at all. The best I can think of could be some larger fainter remnant from the planetary nebula.
Thanks Colin. Your interpretation of the blue fits the general consensus. The term OIII shock front has been mentioned.
Thanks Mike. Yes I was pretty sure I had posted it at some stage. Still I think this image is a considerable improvement on the original posting hence the decision to post it again.
Great image Steve - very faint difficult object.
The faint PN in the bottom corner is faintly visible on Simbad (AladinLite) but Longmore 8 isn't visible. The small PN doesn't have a designation on Simbad.
As far as the blue goes - there is a lot of blue in the right side of the image - doesn't look like a reflection nebula. Maybe it is a large faint PN? Could it be some sort of artifact?
Great image Steve - very faint difficult object.
The faint PN in the bottom corner is faintly visible on Simbad (AladinLite) but Longmore 8 isn't visible. The small PN doesn't have a designation on Simbad.
As far as the blue goes - there is a lot of blue in the right side of the image - doesn't look like a reflection nebula. Maybe it is a large faint PN? Could it be some sort of artifact?
Tony.
Thanks Tony. The blue is OIII emission which is somehow associated with Longmore 8 (the double ring). It seems it is some form of shock front.
