ICEINSPACE
Moon Phase
CURRENT MOON
Waning Gibbous 90%
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23-06-2017, 02:11 AM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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One night, one galaxy - NGC 6300
Good (cold) weather and almost the longest night of the year, allowed me to collect all the data for this image through 5 filters (LHaRGB) in a single night.
While many are attracted to the more famous and photogenic Fighting Dragons in Ara, there are also some nice galaxies to shoot in this starry area too.
Once again I only had to chuck one single sub from the whole nights almost 8hr data set...aaand manually turning the dome throughout plus a manual meridian flip and re-target
This was a good data set, no darks were used, no noise reduction was used nor any gradient removal, it was enjoyable to process (to 2am in the morning ) .
At 50 Million light years distance and 60,000 light years across, NGC 6300 in Ara is a galaxy with a relatively modest angular size of 4.3' X 2.8' and shines at magnitude 11 so not an easy target. Although it is not often imaged, it does have beautiful spiral arms with many fine dust lanes that are connected by a straight bar that runs through the middle of the galaxy. NGC 6300 is not a standard spiral galaxy, it is actually a type II Seyfert galaxy. Like most galaxies NGC 6300 is thought to contain a massive black hole at its heart some 300 000 times more massive than the Sun. This black hole is emitting high energy X-rays as galactic material is pulled into it.
Anyway, enjoy this quicky one nighter....
Full Frame
Close up
Some more galaxies in Ara are is in the processing pipeline, so stay tuned
Mike
Last edited by strongmanmike; 23-06-2017 at 02:25 AM.
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23-06-2017, 02:52 AM
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PI cult member
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Join Date: Dec 2012
Location: Flaxton, Qld
Posts: 2,064
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Nicely done.
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23-06-2017, 08:38 AM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,142
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That's a great shot Mike - the seeing must have been very good! Love the colour & detail too! Very "speccy" indeed !
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23-06-2017, 08:50 AM
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Ultimate Noob
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Join Date: Aug 2011
Location: Melbourne
Posts: 6,984
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Apart from those two Milky Way stars blocking the view of the galaxy core (you should have moved them; moved yourself sufficiently far enough so now have them imped the view), a beautiful shot
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23-06-2017, 08:52 AM
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Narrowing the band
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Join Date: Mar 2011
Location: Euchareena, NSW
Posts: 3,719
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Wow ! A super-ultra-productive evening, and a very pretty, intriguing result.
A most unusual galaxy. We struggled to follow the spiral arms in and find the central bar: there seemed to be two possible candidates for the bar, and two candidates for the Seyfert nucleus. Where did I leave my x-ray spectrometer?
Ah, here it is, under the coffee machine, trying to keep warm.
Perhaps the arms are a bit on the flocculent side like M83.
The two bright field stars add to the image visually.
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23-06-2017, 09:02 AM
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PI rules
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Join Date: Jul 2006
Location: Sydney
Posts: 2,631
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Nice little galaxy there Mike. Beautiful crisp detail right down to the core. Good balance in the star colours.
Geoff
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23-06-2017, 10:42 AM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by lazjen
Nicely done.
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Cheers Chris
Quote:
Originally Posted by marc4darkskies
That's a great shot Mike - the seeing must have been very good! Love the colour & detail too! Very "speccy" indeed !
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The seeing was ok about average for my site but it didn't vary too much during the Lum...I tell's ya, this area of NSW/ACT is a sure bet
Quote:
Originally Posted by Atmos
Apart from those two Milky Way stars blocking the view of the galaxy core (you should have moved them; moved yourself sufficiently far enough so now have them imped the view), a beautiful shot
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I did try and drag them out'a the road but I am waaaay out of shape
Quote:
Originally Posted by Placidus
Wow ! A super-ultra-productive evening, and a very pretty, intriguing result.
A most unusual galaxy. We struggled to follow the spiral arms in and find the central bar: there seemed to be two possible candidates for the bar, and two candidates for the Seyfert nucleus. Where did I leave my x-ray spectrometer?
Ah, here it is, under the coffee machine, trying to keep warm.
Perhaps the arms are a bit on the flocculent side like M83.
The two bright field stars add to the image visually.
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Cheers Mike and Trish, I am very lucky (touch wood) my rig isn't automated but it is very reliable and repeatable Getting a low noise relatively deep LHaRGB image of a modest galaxy in one night makes for a happy contented imager
Quote:
Originally Posted by Geoff45
Nice little galaxy there Mike. Beautiful crisp detail right down to the core. Good balance in the star colours.
Geoff
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Glad you enjoyed the view Geoff , not many versions of this out there. I targeted this one due to an image I recalled taken by Jim Riffle with his awesome Centurion 18 (18" F2.8 fork mounted scope) from Leyburn SEQ, some 15 years ago or so...that was my dream scope and I wouldn't mind one now! His images still hold their own even after all this time.
Mike
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23-06-2017, 11:44 AM
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Novichok test rabbit
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Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,388
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If your site was only average last night, and mine was spectacular with NIL star scintillation at all, then I beat you
Just a bloody shame about my LP issues
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23-06-2017, 11:51 AM
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Registered User
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Join Date: Aug 2010
Location: Canberra
Posts: 3,654
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Another good one Mike. Very nice colour and detail.
Cheers
Steve
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23-06-2017, 11:58 AM
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a.k.a. @AstroscapePete
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Join Date: Oct 2011
Location: Sydney
Posts: 1,637
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Lovely Mike - a great rendition of a tiny target!
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23-06-2017, 12:21 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by LewisM
If your site was only average last night, and mine was spectacular with NIL star scintillation at all, then I beat you
Just a bloody shame about my LP issues
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He he well this data was taken on 18 June. My judgement of seeing is old school, ie I base it on experience and my guiding quality, if the subs come down and look clear and tight and my star centroid guide graph is a tight round bunch of grapes I go Ooooh yeeeah! If they come down and they are soft and pom pom like and my guide graph looks more like a pineapple, I go Doh! (and usually only collect RGB at those times). Those are the two extremes, it's called the OYD seeing scale "Oh Yeah! to Doh!"
It is a 5 level scale: O, G, M, S, D or Ooooh Yeah!, Gee not bad, Meah, Sheesh and Doh!
So average means average for my site and gets a "Meah".
Not sure how this scale relates to other sites though....so it is of limited universal use
Quote:
Originally Posted by Stevec35
Another good one Mike. Very nice colour and detail.
Cheers
Steve
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Thanks Steve, it was an enjoyable process and (relatively) instant gratification
Quote:
Originally Posted by Retrograde
Lovely Mike - a great rendition of a tiny target!
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Cheers Pete
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23-06-2017, 12:47 PM
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<--- Comet Hale-Bopp
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Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
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Awesome Mike! Too small for your finderscope....
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23-06-2017, 01:36 PM
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Registered User
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Join Date: Mar 2005
Location: Sydney
Posts: 5,138
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23-06-2017, 02:20 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by cometcatcher
Awesome Mike! Too small for your finderscope....
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Kevin, you and my bloody finderscope!...you do know I need it to do my initial pointing and alignment synch!! don't you?? stop snitching it!
Quote:
Originally Posted by atalas
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Grazie Big Louie
Mike
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23-06-2017, 02:28 PM
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Registered User
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Join Date: Nov 2009
Location: Sydney
Posts: 1,193
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That's pretty awesome resolution Mike
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23-06-2017, 04:42 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by Marke
That's pretty awesome resolution Mike
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Yeah? Thanks Mark but dunno bout "awesome" perhaps compared to Kevins finderscope...? which is mine anyway ..but not bad for a 12" F3.8 outside Canberra under internationally mediocre (ie "meah") seeing I guess?
Mike
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23-06-2017, 05:11 PM
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Registered User
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Join Date: Jan 2011
Location: Rylstone, NSW, Australia
Posts: 1,398
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That is a very very pretty result! Very satisfying to look at...and, particularly nice for one night's effort!
Peter
PS Being a refractor guy I don't usually pay attention to big spikes on bright stars, but yours are awfully "colourful." What causes them to alternate red/blue? Any idea? Is it normal? I've not paid attention enough to remember if this is just what scopes like yours do.
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23-06-2017, 05:46 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by PRejto
That is a very very pretty result! Very satisfying to look at...and, particularly nice for one night's effort!
Peter
PS Being a refractor guy I don't usually pay attention to big spikes on bright stars, but yours are awfully "colourful." What causes them to alternate red/blue? Any idea? Is it normal? I've not paid attention enough to remember if this is just what scopes like yours do.
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Thanks a lot Peter! He he yeah that star lower left has a beaut set of diffraction spikes huh? This colour rainbow effect is quite common really, particularly in fast relatively thick spidered reflectors, it usually looks quite lovely but I agree that star does push the aesthetic levels, even for my eyes...probably look good in one of Andy's Picasso creations (That was a term or endearment Andy )
Mike
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23-06-2017, 08:17 PM
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Registered User
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Join Date: Nov 2009
Location: Sydney
Posts: 1,193
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Quote:
Originally Posted by strongmanmike
Yeah? Thanks Mark but dunno bout "awesome" perhaps compared to Kevins finderscope...? which is mine anyway ..but not bad for a 12" F3.8 outside Canberra under internationally mediocre (ie "meah") seeing I guess?
Mike
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Mate compared to a suburban Sydney backyard it's a freakin masterpiece
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24-06-2017, 04:11 AM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,176
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Quote:
Originally Posted by Marke
Mate compared to a suburban Sydney backyard it's a freakin masterpiece
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... ....errr? or more like ....with a bit of
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