Ic 4677 a-f

[Jens Bohle]

Hi folks,

has anybody out there observed the knots A-F in IC 4677 (the large bright condensation in the halo of Cat-Eye-nebula)?


regards, Jens

[Dragan]

Hi folks,
has anybody out there observed the knots A-F in IC 4677 (the large bright condensation in the halo of Cat-Eye-nebula)? regards, Jens

Do you have a finder chart of these knots? Any references?

I've observed IC4677 several times in my 25" as well as the 48" and I can't say I've ever looked for these knots.

I'd love to have a finder for next time out.

[Jens Bohle]

This is a good source http://arxiv.org/pdf/astro-ph/0507204.pdf

I´m curious if these knots are visible in larger scopes...

[Jimi Lowrey]

I have not looked for the knots that you are asking about. I do not think that they would be difficult with a O III filter.

I have seen the parts that I marked on the image. Unfiltered.


IC 4677 iv.JPG

Over the years I have seen them many times.

[Howard B]

Hi Jens,

I've clearly seen the entire outer halo around NGC 6543, which includes IC 4677, with the 2.2 meter Bok telescope on Kitt Peak a few years ago but I didn't look closely enough at 4677 itself to say if the A-F knots were visible. The seeing wasn't very steady while we observed 6543 but I think with a few minutes to observe and steady skies that they would have been seen. However, I did easily see the hexagon shape of the outer halo and that was really cool!

I've seen about half the outer halo with my 28 inch and 4677 is by far the brightest part but it's looked like a single object, not a collection of knots. Here too I haven't been looking for them so now next time I'll see what I can detect. Your finder chart will be really helpful, thanks.