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Orion - only 12 minutes of data. QHY9

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#1 alpal

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Posted 12 January 2013 - 12:46 AM

I hadn't been able to do any imaging for more than 2 months.

The clouds came in last night so I only got one 3 minute
frame each of LRGB. I did take 10 x 5 minute frames of Ha
but they were only usable for the luminosity of the core.
I'll know next time to do 20 minute Ha sub-frames.
I am surprised at what the QHY9 can do with an 8" f6 Newt. with so little data.

A larger version 1600 x 1214 pixels is available on my flickr photos.

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#2 alpal

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Posted 12 January 2013 - 08:55 AM

Here is a cropped version of the 10 x 5 minutes Ha stack = 50 minutes.
It's been heavily stretched & also sharpened at 2 pixels.
I would have been better off with 2 x 25 minute frames in the same time
but I was shooting between clouds.
It did help with getting some detail out of the core in the first image.
The trapezium came up nicely as the Ha stars are always small.

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#3 turbo399

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Posted 12 January 2013 - 02:28 PM

Allan
It sure is a frustrating hobby but the reward is evident in this really nice image which has beautiful resolution of the trapezium. :)
Clear Skies

#4 Harel_Boren

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Posted 12 January 2013 - 05:40 PM

Allan
It sure is a frustrating hobby but the reward is evident in this really nice image which has beautiful resolution of the trapezium. :)
Clear Skies


I can't agree more !

Cheers,
Harel

#5 alpal

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Posted 12 January 2013 - 06:00 PM

Thanks Terry & Harel,
Yes - it can be a bit too frustrating at times.
I am jealous of people who gather data all night for 3 nights in a row.
It must be a joy to process such good data.

I notice that there is always something that doesn't quite go right.
Each night is a new adventure & always new problems to solve.
e.g. for the above images - at the end of the night
- I went to carefully take the telescope
out of the tube rings complete with camera so that
I could do some flats later on & my Baader Varilock adjustment sleeve had come loose.
The camera just turned when touched - therefore - no flats!
I'll know to do it up tight next time.

Another problem was a satellite that went through the red frame.

I found a great trick with Photoshop.
I used the magic wand to select it then adjusted curves to minimise it -
then I used the "Spot healing brush tool" which I'd never used before in little dabs along the trail.
It removed it perfectly.

Anyway - it's good to be back imaging again.

cheers
Allan

#6 Bill W.

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Posted 13 January 2013 - 09:16 AM

That's a great result for such little time. I've been clouded in for about a month now. I took that time to do some equipment changes. Hopefully, I didn't jinx myself more. Good luck on the clear skies! May three nights of clear skies come your way! :D

-Bill

#7 alpal

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Posted 13 January 2013 - 03:29 PM

Thanks Bill,
A month of no imaging isn't too bad for you -
at least you've got some equipment changes.

I'm sure I'll get some good nights & I hope
to give the QHY9 a real workout this year.
I am so surprised by my new camera - it's a big step up
in performance from an unmodded Canon EOS 1000d.
Also - my system is fully portable so I can go to any dark site.

cheers
Allan

#8 astromattical

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Posted 13 January 2013 - 03:34 PM

Beautiful image - thanks for sharing!

#9 rigel123

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Posted 13 January 2013 - 04:50 PM

That's really good for 12 minutes!

#10 alpal

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Posted 14 January 2013 - 12:36 AM

Thanks Matt & Warren.

I had taken some LRGB shorter duration shots that I hadn't looked at till today.
I ended up combining the 10s & a 60 s RGB subs ( 2 subs for each colour)
with entropy weighted stacking in DSS & used only RGB to make a colour shot of the Trapezium.
(The luminance was blown out too much to use.)
I then combined this improved image in layers into my Orion image
to show the Trapezium better.
The larger new version of Orion is on my flickr photos.
I think it's quite an improvement?
Did I get more than 4 stars?

The first image of The Trapezium is displayed at full resolution but cut down for a .jpg.

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#11 alpal

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Posted 14 January 2013 - 12:39 AM

Then the Trapezium blended:

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#12 alpal

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Posted 14 January 2013 - 02:05 AM

I just processed a 30s & 60s subframe of Ha for the Trapezium.
I stacked them in DSS.
I can see more stars there but they are faint.
The Ha gives tighter sharper stars but not such a pretty pic.

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#13 J.P.M

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Posted 14 January 2013 - 10:06 AM

Very well spent 12mins!

#14 alpal

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Posted 14 January 2013 - 03:23 PM

Thanks JPM.
It's been great to get something done after many months
of no data collected.

#15 Harel_Boren

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Posted 14 January 2013 - 04:29 PM

The Ha image can be used to enhance luminosity ...
Lovely result.
Cheers,
Harel

#16 Bill W.

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Posted 14 January 2013 - 08:00 PM

Also - my system is fully portable so I can go to any dark site.


I have a Atlas EQ-G for my mobile imaging... :D I'm not making a road trip any time soon because it's winter time here.

-Bill

#17 Bill Snyder

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Posted 14 January 2013 - 09:33 PM

Nice work Allan! You got a lot of data in 12min.
Bill

#18 alpal

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Posted 15 January 2013 - 02:24 AM

The Ha image can be used to enhance luminosity ...
Lovely result.
Cheers,
Harel


Thanks Harel,
I did use maybe 10% opacity of the Ha data but 100% for the core of the first image as Luminosity.
I am still getting used to the Ha data but one thing is for sure
I'll have to make 20 minute subframes or go for 5 minute at 2x2 binning to get enough signal ( but lose sharpness)
I am only using gain of 5% and offset of 100.
I am still figuring this new camera out.

cheers
Allan

#19 alpal

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Posted 15 January 2013 - 02:28 AM

I have a Atlas EQ-G for my mobile imaging... :D I'm not making a road trip any time soon because it's winter time here.

-Bill


Hi Bill,
I wish you better luck with the weather.
Have a look at my flickr photos.
I did a good mod on my EQ6 which gives 3 x better guiding.

http://www.flickr.co.../in/photostream

maybe that could help you?

cheers
Allan

#20 alpal

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Posted 15 January 2013 - 02:31 AM

Nice work Allan! You got a lot of data in 12min.
Bill


Thanks Bill,
It ended up a bit more than 12 minutes of data when the Trapezium information was added.
Still - I'm surprised at what a mono camera can do compared with my old lowly DSLR.
12 minutes on the QHY9 is worth more than 120 minutes on a DSLR.

cheers
Allan






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