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Astrophotography and Sketching >> Solar System Imaging & Processing

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shadowdoc31
super member


Reged: 11/27/08

Loc: Chattanooga, TN - USA
Europa shadow transit
      #5489646 - 10/26/12 02:42 AM Attachment (33 downloads)

Greetings--

Last night had the best air in quite a while, posting
my best pic of the lot. I welcome your comments and
suggestions.

Thanks,
RW

Additional details--
Celestron 11" reflector
DMK 21AU618 monochrome camera / 2x barlow
~1,000 of 4,000 frames in each channel stacked
processed as rRGB / filtered luminance


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Mike Phillips
Post Laureate
*****

Reged: 02/21/06

Loc: Swift Creek, NC - 35.682 N, 78...
Re: Europa shadow transit new [Re: shadowdoc31]
      #5489932 - 10/26/12 10:02 AM

Very nice detail. Perhaps a bit of noise that you can soften without loosing detail? Have you tried WinJUPOS? I've also found that while the R as lum adds some detail, it changes the color balance.

I like what you've got!

Mike


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bunyon
Carpal Tunnel
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Reged: 10/23/10

Loc: Winston-Salem, NC
Re: Europa shadow transit new [Re: Mike Phillips]
      #5489963 - 10/26/12 10:32 AM

I think Mike is right: you have great data there. The final image is a bit too red on my screen and fairly noisy. Can you stack more frames per channel? My first attempts (disclaimer: I'm far from expert at this) I assumed the total number of frames would smooth the noise but I found that if the individual channels were still noisy, that noise showed up in the compilation.

So, maybe boost to 1500 or 2000 frames per channel and tweak the color and you'll have a (more) awesome shot.


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tjensen
Carpal Tunnel


Reged: 02/16/05

Loc: Chapel Hill, NC
Re: Europa shadow transit new [Re: bunyon]
      #5489967 - 10/26/12 10:34 AM

What Mike and Paul said.

Great shot!!!!


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shadowdoc31
super member


Reged: 11/27/08

Loc: Chattanooga, TN - USA
Re: Europa shadow transit new [Re: tjensen]
      #5490090 - 10/26/12 11:54 AM Attachment (10 downloads)

Thanks for the input; definitely a lot of noise present,
especially in the darker channels. I played around with
the processing a bit (more frames, less sharpening,
color balance), and have attached a less noisy result
below.

Thanks for looking!


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ToxMan
Carpal Tunnel
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Reged: 01/23/11

Loc: Tucson, Arizona, USA
Re: Europa shadow transit new [Re: shadowdoc31]
      #5490126 - 10/26/12 12:19 PM

There is some good improvement in second image. Wonderful data! Thanks for sharing.

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kowspot2000
professor emeritus


Reged: 07/23/11

Loc: Corvallis, OR
Re: Europa shadow transit new [Re: ToxMan]
      #5490600 - 10/26/12 05:32 PM

Wow! That's amazing. I can't believe you can see the shadow on its surface :O

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