The 4th brightest Globular cluster...

[strongmanmike]

Well...there are a few of'em up there but...after Omega Cen, 47 Tuc and M22, NGC 6752 in Pavo is the 4th brightest and certainly the unsung hero of globular clusters.

Accompanied by beer and singing...NGC 6752 (http://www.pbase.com/strongmanmike2002/image/166051964/original)

Mike

[atalas]

Beautiful Mike :thumbsup::thumbsup::thumbsup:

[Placidus]

Just gorgeous. Beautifully acquired and processed. The handful of red giants came out very nicely. What a lovely image!

[gregbradley]

6752 is probably the most photogenic of the globs. Nicely done. But hey, its not done with an FSQ?? whatttt?

Correct colour of stars in globs has been a topic recently on this site. Globs are older stars and typically dominated with sunlike yellow old stars. I wonder if it should show more yellow stars or is the colour correct (not a criticism more of a question).

Greg.

[billdan]

Very pretty Mike, the colour balance looks OK to me. Greg, maybe its a more recent Glob, as there are a lot of young blue stars in there.

Cheers
Bill

[strongmanmike]

Cheers guys :thumbsup:...hadn't done a glob in a while and wanted a quick fix :D

As to the correct colour Greg, NGC 6752 sits in a area of sky with very little obscuration/extinction from dust, so, unlike many other globs, there is almost no interstellar reddening. If you look closely, there is indeed a nice spread of mostly yellow-white stars, with a good spattering of yellow-orange ones plus a few tiny almost red ones and then quite a few blue stragglers,. These colours and hues will vary somewhat across different screens but overall this is certainly what we would expect but, as you say, perhaps the bulk of the yellow-white stars could be a little more yellow/red..?

Mike

[marc4darkskies]

A lovely blob of colourful stars Mike! :thumbsup:;)

[gregbradley]

Yes I saw that spread of colours, that's why its more of a question than a comment about the image. For sure Omega is often shown as too blue/white. I am not sure how that translates to other globs.

Greg.

[SimmoW]

Great catch Mike, but what's this mere 3hrs of data? Hope you aren't trying to copy me!

Hehe, just joking, looks deep enough from here

[topheart]

Great work Mike!
Cheers,
Tim

[Atmos]

I agree with Greg, it should be yellower. Gratton (2003) calculated it as been 13.4 billion years old, a paper in 1996 had it at 13.5-14.6 and Wikipedia says 11.5.

A study from Swinburne in 2010 using HST data:
https://arxiv.org/pdf/1001.4289.pdf

11.78 billion years old. Off the top of my head should have the average star mass at 0.9 solar masses.

Very nicely resolved however!

[DJT]

You just cant go past a well done Glob and this cluster is also one of my favourites. :thumbsup:

[cometcatcher]

Looks like the brightest going by your image Mike. It's a beauty.

[LewisM]

Yeah, what he said. It's not right till the FSQ renders it. :P

[strongmanmike]

Thanks 100acre Marcus :P



Yes I got that, all good discussion :) I am waiting for the new Robofocus bracket....but I'm in no hurry, it will be a major reconfigure so I'm just taking my time...the FSQ looks beautiful sitting on the side board in the lounge though...I salivate everytime I walk past it :D



Yes, fixation on exposure time wastes a lot of peoples time, many objects simply don't need it for a pleasing result ...particularly with the H694 and 12" at F3.8 :thumbsup:



Thanks Tim, we don't do many globs, sometimes they are a nice break from..:question:..The Running Chicken or Lagoon :lol:



I do agree with you guys but it's a little bit semantic.... and besides, presenting it somewhat whiter keeps it looking a tad more like its visual appearance :thumbsup:



Thanks Dave, the Tak106 will be underway soon... :D



Cheers Kevin, I tried to keep the bright look intentionally actually, I like the brilliance :)...although I'm not totally happy with the handling of the core, it's a very bright concentrated core (bit like 47Tuc) so trying to reveal a little of the inner resolution is hard to match in naturally while still keeping the relative brightness balanced....:confuse3:

Mike

[Derek Klepp]

Cheers Mike one of my favourites.

[astronobob]

A spectacular Glob Image in my books there, Mike, the flow of light/brightness levels from the outfield into the core is always a tricky, the actual globs vary this way as much as they appear in different images; that I do know, who' d of thunk ;-)
A great rendition with this you did, here, very pleasing to the eye :thumbsup:

[strongmanmike]

Cheers Derek, me too :thumbsup: and M22



Thanks Bob :thumbsup:

Mike

[Stevec35]

That's a nice NGC 6752 Mike. I've been thinking of doing this one myself as it's one I go back to every few years. I've always rated it third best after Omega and 47 Tuc because of the strong central condensation. I actually wasn't aware that M22 is slightly brighter.

Cheers

Steve

[strongmanmike]

Thanks Steve, always a good one to show newbies this time of year through a scope, while Omega is out of sight and 47 Tuc is low in the sky in the early evening :thumbsup:

Mike

[DaveNZ]

You have some nice detail there big Mike. Also I like the way you have processed the core.

Cheers Dave

[strongmanmike]

Cheers Dave, funny while it is ok, I was not 100% happy with the core blending actually, was gunna repro that bit but meah...lost interest :P

Mike

[Shiraz]

Beautiful Mike. the handling of the core is great - gets across the brilliance without completely saturating and the star colours are convincing, with a smattering of blue stragglers. Nice. Cheers Ray

[strongmanmike]

Cheers Razzor, glad you liked it...a quicky but a goody :thumbsup:

Mike

[Ryderscope]

Lovely. Like a little bag of jewels.

[strongmanmike]

Exactly Rodney...200 000 jewels in fact :)

[multiweb]

Great glob. Remember a pic by Joe Cauchi on this one. Always liked it with that blue star offset. :thumbsup:

[strongmanmike]

Cheers Marc, yes the blue foreground star is a nice feature of this glob

Mike

[RickS]

Real purty, Mike!

[strongmanmike]

Thank'ya kindly Mr Rickster :)