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Old 13-10-2013, 11:20 PM
Stevec35 (Steve)
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NGC 300 - not one for the suburbs I think

I haven't imaged this one for a long time so I thought it was time to give it another go. I had terrible light pollution from surrounding lights and the seeing was never better than average but I hope I salvaged something acceptable. It really needs a dark sky I think.

Cheers

Steve

http://members.pcug.org.au/~stevec/n...11002_RC14.htm
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  #2  
Old 13-10-2013, 11:26 PM
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TimberLand (Justin)
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Not for the suburbs, I agree, but what an effort. Great colours, but I see what you mean with the background being a bit bright.

Justin
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  #3  
Old 14-10-2013, 05:48 AM
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That looks quite good despite your light pollution.

Greg.
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  #4  
Old 14-10-2013, 08:02 AM
Stevec35 (Steve)
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Quote:
Originally Posted by gregbradley View Post
That looks quite good despite your light pollution.

Greg.
Thanks Greg. Wish I had a dark site like yours.

Quote:
Originally Posted by TimberLand View Post
Not for the suburbs, I agree, but what an effort. Great colours, but I see what you mean with the background being a bit bright.

Justin
Thanks Justin. I perhaps need to tweak the background a bit.
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  #5  
Old 14-10-2013, 08:06 AM
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It's not bad despite the light pollution. Heaps of detail visible. Maybe more integration will give you a level of brightness. I suspect it would require around 30 hours worth to obtain that.
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Old 14-10-2013, 08:50 AM
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A very nice result, Steve! As Paul said, with enough data you could compete with a dark sky rendition but it takes a lot of exposure time to get the noise from the sky glow under control.

Cheers,
Rick.
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  #7  
Old 14-10-2013, 09:54 AM
Stevec35 (Steve)
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A very nice result, Steve! As Paul said, with enough data you could compete with a dark sky rendition but it takes a lot of exposure time to get the noise from the sky glow under control.

Cheers,
Rick.
Quote:
Originally Posted by Paul Haese View Post
It's not bad despite the light pollution. Heaps of detail visible. Maybe more integration will give you a level of brightness. I suspect it would require around 30 hours worth to obtain that.
Thanks guys. I might return to it when the moon goes away again. The best image I've seen of it is this one that used a 32" telescope at CTIO in Chile with 28 hours exposure.

http://www.chart32.de/index.php/galaxies-m
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  #8  
Old 14-10-2013, 01:15 PM
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Despite the problems, it is a really nice image.

I have resorted to H-a imaging ONLY whilst in Suburbia. No point TRYING to fix LP'd images.

Now to buy an Astronomik 1.25 OIII filter.
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  #9  
Old 14-10-2013, 06:08 PM
Stevec35 (Steve)
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Despite the problems, it is a really nice image.

I have resorted to H-a imaging ONLY whilst in Suburbia. No point TRYING to fix LP'd images.

Now to buy an Astronomik 1.25 OIII filter.
Thanks Lewis. Unfortunately I'm tied to my suburban location so have to make do with what I have. It is slightly easier these days though with some pretty good LP software tools around.
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  #10  
Old 14-10-2013, 06:17 PM
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Very nice image Steve,
Canberra certainly has become light polluted in the last 25 years,
I have five tall streetlights surrounding my house in Garran. (wife chose the house )
How I miss Jindabyne now!

Last edited by Kunama; 14-10-2013 at 07:39 PM.
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  #11  
Old 14-10-2013, 07:29 PM
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Maaaaate.... just look a those beautiful, perfectly shaped, little stars to the edge of the field... that RC is a pearler.

Just double the L exposure and it will be *the* NGC 300 of the year
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  #12  
Old 14-10-2013, 10:36 PM
Stevec35 (Steve)
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Originally Posted by Peter Ward View Post
Maaaaate.... just look a those beautiful, perfectly shaped, little stars to the edge of the field... that RC is a pearler.

Just double the L exposure and it will be *the* NGC 300 of the year
Thanks Peter. I don't think it's that good although I did get a favorable response from Johannes Schedler which is rare.

Quote:
Originally Posted by Kunama View Post
Very nice image Steve,
Canberra certainly has become light polluted in the last 25 years,
I have five tall streetlights surrounding my house in Garran. (wife chose the house )
How I miss Jindabyne now!
Thanks Matt. I'm in Theodore so I'm not too bad toward the South but the Tralee development has me worried. I did get the local government to change a particularly bad street light so I don't know if that's an option for you.
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  #13  
Old 14-10-2013, 10:38 PM
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That's great Steve, love the details and background galaxies, the core area could probably be a bit brighter I recon as it looks a little flat and dark as is, still, a great result though despite the suburban glow

MIke
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  #14  
Old 14-10-2013, 10:43 PM
Stevec35 (Steve)
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Originally Posted by strongmanmike View Post
That's great Steve, love the details and background galaxies, the core area could probably be a bit brighter I recon as it looks a little flat and dark as is, still, a great result though despite the suburban glow

MIke

Thanks Mike. I'm still playing around with it but so far haven't come up with a better version than the one posted.
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  #15  
Old 14-10-2013, 11:43 PM
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Nice work, Steve... imaging galaxies under light pollution shows dedication
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  #16  
Old 15-10-2013, 01:36 AM
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Steve,
Quote:
The best image I've seen of it is this one that used a 32" telescope at CTIO in Chile with 28 hours exposure.

http://www.chart32.de/index.php/galaxies-m

Hi Steve,
Wow - no one seems to be getting better than pics than them.
The pics look like they are from the Hubble.

Maybe longer exposures would bring your picture out?
Have you tried any different processing to brighten everything?
Anyway - it's a good sharp pic.

cheers
Allan
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  #17  
Old 15-10-2013, 07:42 AM
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That's an excellent image Steve.

With such a his res system, you are completely at the mercy of the sky for detail and sensitivity - no way round that but to find a site as good as the one in Chile. Regards Ray
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  #18  
Old 15-10-2013, 07:48 AM
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Still got some very good details and colors. Well done.
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  #19  
Old 15-10-2013, 09:54 AM
Stevec35 (Steve)
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Quote:
Originally Posted by multiweb View Post
Still got some very good details and colors. Well done.
Thanks Marc

Quote:
Originally Posted by Shiraz View Post
That's an excellent image Steve.

With such a his res system, you are completely at the mercy of the sky for detail and sensitivity - no way round that but to find a site as good as the one in Chile. Regards Ray
Thanks Ray. It does depend to some extent on the target of course. There are far easier galaxies to image than NGC300.

Quote:
Originally Posted by alpal View Post
Steve,



Hi Steve,
Wow - no one seems to be getting better than pics than them.
The pics look like they are from the Hubble.

Maybe longer exposures would bring your picture out?
Have you tried any different processing to brighten everything?
Anyway - it's a good sharp pic.

cheers
Allan
Thanks Allan. I'm still playing around with it but so far haven't produced a better image. Of course longer exposures would help - perhaps I'll get some more data when the moon goes away.
Quote:
Originally Posted by naskies View Post
Nice work, Steve... imaging galaxies under light pollution shows dedication
Thanks Dave. I live in hope that maybe lighting authorities will install better lighting fixtures but in general the whole light pollution situation is getting worse. There's a new development starting up to the south east of Canberra that will probably kill my last reasonably good sky.
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  #20  
Old 15-10-2013, 10:48 AM
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Steve,
Quote:
Thanks Allan. I'm still playing around with it but so far haven't produced a better image. Of course longer exposures would help - perhaps I'll get some more data when the moon goes away.

Hi Steve,
I hope you don't mind me having a go at your image?
What about this version which is a bit brighter & a few other tweaks?
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