Quote:
Originally Posted by ngcles
Hi Smirnoff & All,
Good to read your descriptions of these interesting PNe -- thanks for taking the time to post so we can all read 'em.
Yep, IC 4191 is a rather nasty proposition from the point of view of its stellar-nature. Blinking, as you wrote is really the only option. Other than the exercise of finding/identifying the little blighter, there isn't that much to the view.
Very interested in your description of NGC 5189 -- which is really quite similar to my impressions back in 1998 with 25cm:
x181 17' TF. Mag 9.9 Size 100". A thoroughly amazing object, certainly the most interesting PNe in the southern sky. Very difficult object to describe adequately because the structure is so complex. Without the UHC filter it appears within a diamond shaped asterim of *s mags 10-12 about 5' x 2.5' in PA 20. With the UHC filter it is involved with the W most of these *s. Generally irregular in structure, kind of like a barred spiral eg which has a very strong bar and weak stubby arms and an extended halo all round. The bar is in PA 30, about 1.5-2' long, it is slightly curved, concave to the SE, and that flank is slightly generally a little brighter than it's counterpart and a little better defined. This bar is irregular in brightness and mottled. The brightest and broadest area is about the SSW end. Generally narrower in the NE and dimer. This bar seems to eminate from a point just E of the W most member of the diamond of *s I have described, and leads toward the N most member. At the NE end the bar has a bright "nob" at the end and then curls off in the direction of SE -PA 140 and terminates. At the SSW end there is a little extension that is less bright than the other end and curls away to head off generally W. A very large roughly round, slightly elong in PA 30 halo encircles the object with much lower S.B haze out to a diameter of perhaps 2-2.5'. The central areas are decidedly bluish without the filter and no central * is visible.
Have you taken a look at Musca's "forgotten" PNe NGC 4071 ??
And yep, I agree The Ghost of Jupiter (NGC 3242) is one of the most intensely coloured PNe in the sky.
Enjoyed your report !!
Best,
Les D
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Hi Les,
Thanks for you description of NGC 5189!
NGC 5189 is certainly the most intruiging PN in the sky! No other PN anywhere in the sky comes close to its visual structure and detail that shows in the eyepiece. It would be a spectacular sight from dark skies. The transparency during the night was pretty ordinary and I was extremely tired so overall I didn't see as much as I probably would've.
I've had a shot at NGC 4071, very faint, infact barely visible without a filter, still feeble with the OIII in place at 217x. I has the impression of a circular or nearly circular ring, uneven in thickness and brightness. I'll have to investigate this one further on a night of better seeing/transparency and when I'm not half dead
Also, external glare interfered with the obs, I'll have to throw a dark hood over my head and fashion a dewshield for the front of the 12" dob
IC 4191 is ridiculous! Anyone know the diameter for this one? (if it HAS one LOL!) There are alot of tiny planetaries in Carina aswell which I've observed during previous sessions that are nearly carbon copies, with tiny circular disks and bluish or aqua hues.
The Ghost of Jupiter is certainly fantastic, no where else in the sky have I seen such intense colour, (except the homunuculus maybe) and it's structure is fascinating aswell. Even my non-astronomer mum and grandma were very impressed!