ICEINSPACE
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Moon Phase
CURRENT MOON
Waxing Crescent 9.3%
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22-07-2009, 09:34 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,475
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Colourful Tucan
Not much to say really.
Big bright glob.
Southerly Dec.
Not great seeing or a lot of exposure (LRGB 20:20:10:15 mins)
But problably my favorite glob...(seen here in technicolor)
http://www.atscope.com.au/BRO/gallery15.html
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22-07-2009, 09:41 PM
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Registered User
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Join Date: Oct 2006
Location: Australia
Posts: 4,646
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Hi Peter, you just have to love the detail in the core. What scope was used for this southern gem?
Very nice.
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22-07-2009, 09:49 PM
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Registered User
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Join Date: Mar 2008
Location: Canberra, Australia
Posts: 601
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Great image, beautifully coloured and the core is well resolved. I like it!!
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22-07-2009, 10:00 PM
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Registered User
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Join Date: Apr 2006
Location: Warrnambool
Posts: 12,805
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Yea, I like it too, the stars in there are just incredible, beautiful image Peter
Leon
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22-07-2009, 10:07 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,475
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Thanks Leon, Keith, Doug!
To be frank it was a pretty lazy effort with the RCOS 14....then again significantly longer exposures probably would have led to purely white stars.
Swings and round-abouts 
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22-07-2009, 10:23 PM
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Like to learn
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Join Date: Jul 2007
Location: melbourne
Posts: 4,835
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Love the colors Peter ! I agree with you, much nicer with the 20:20:10:15
Beaut scope !
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23-07-2009, 04:49 AM
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Bust Duster
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Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
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Can I ask some newbie questions? How come the R, G, and B are different length exposures? Shouldn't they be the same, unless you're after some false colour or something?
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23-07-2009, 07:55 AM
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Quietly watching
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Join Date: Jul 2007
Location: Yarra Junction
Posts: 3,044
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nicely resolved to the core.
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23-07-2009, 09:34 AM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,080
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Nice colors and resolution. 
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23-07-2009, 09:54 AM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,475
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Quote:
Originally Posted by troypiggo
Can I ask some newbie questions? How come the R, G, and B are different length exposures? Shouldn't they be the same, unless you're after some false colour or something?
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The QE of (most) CCD cameras varies with the wavelength being captured. The camera I use is most sensitive in green, and less so in Red & Blue. Varying exposures helps to "even up the curve" and infact gives a much closer approximation to "true" colour than a straight 1:1:1 exposure ratio.
Last edited by Peter Ward; 23-07-2009 at 09:58 AM.
Reason: clarification
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23-07-2009, 11:01 AM
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Bust Duster
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Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
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Interesting. Thanks for the explanation.
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23-07-2009, 11:09 AM
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Registered User
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Join Date: Nov 2006
Location: Canberra, Australia
Posts: 1,346
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That particular globular cluster burns out in just a few seconds exposure, so you've done a great job resolving that core.
nice work Peter
Martin
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23-07-2009, 06:35 PM
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Registered User
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Join Date: Jun 2007
Posts: 2,926
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Peter,
I'm probably out on a limb here, but images of 47 Tucanae resolved to the core reduce this splendid globular to a run of the mill object.
Visually 47 Tucanae has a striking central condensation.
Astronomers classify globulars according to the degree of central condensation, astroimaging has essentially broken down this distinction.
It is still a fine image however.
Regards
Steven
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23-07-2009, 06:53 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,475
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Quote:
Originally Posted by sjastro
Peter,
I'm probably out on a limb here, but images of 47 Tucanae resolved to the core reduce this splendid globular to a run of the mill object.
Visually 47 Tucanae has a striking central condensation.
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I must admit Steve, there was something about the dynamic of the image I didn't quite like, hence appreciate your input. I reprocessed the data making the core look a little hotter (though still resolved  ) and suspect it is an improvement....
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23-07-2009, 08:18 PM
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Supernova Searcher
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Join Date: Mar 2005
Location: Cambroon Queensland Australia
Posts: 9,326
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Quote:
Originally Posted by sjastro
Peter,
I'm probably out on a limb here, but images of 47 Tucanae resolved to the core reduce this splendid globular to a run of the mill object.
Visually 47 Tucanae has a striking central condensation.
Astronomers classify globulars according to the degree of central condensation, astroimaging has essentially broken down this distinction.
It is still a fine image however.
Regards
Steven
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I disagree, I am not an imager, but I think in this in this day and age any globular cluster with a burnt out core stinks 
If I can resolve the core with my telescope then with modern imageing equipment it should be resolved
I will not even bother looking too much at an image of a globular cluster with the guts burnt out 
47 Tuc has a very interesting core and would be nice if it could be shown in good quality images
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24-07-2009, 10:04 AM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
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Lovely image Peter (of course). Love the star colours - better than my version. But IMHO the short exposure doesn't convey the extent of the envelope of stars in this huge glob (cf my deeper version - layered with shorter exp to save the core).
Cheers, Marcus
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