Jump to content


Photo

Europa shadow transit

  • Please log in to reply
6 replies to this topic

#1 shadowdoc31

shadowdoc31

    Vostok 1

  • -----
  • Posts: 130
  • Joined: 27 Nov 2008
  • Loc: Chattanooga, TN - USA

Posted 26 October 2012 - 01:42 AM

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

Attached Files



#2 Mike Phillips

Mike Phillips

    Soyuz

  • *****
  • Posts: 3519
  • Joined: 21 Feb 2006
  • Loc: Swift Creek, NC - 35.682 N, 78.743°W

Posted 26 October 2012 - 09:02 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

#3 bunyon

bunyon

    Gemini

  • *****
  • Posts: 3236
  • Joined: 23 Oct 2010
  • Loc: Winston-Salem, NC

Posted 26 October 2012 - 09:32 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.

#4 tjensen

tjensen

    Mercury-Atlas

  • -----
  • Posts: 2609
  • Joined: 16 Feb 2005
  • Loc: Chapel Hill, NC

Posted 26 October 2012 - 09:34 AM

What Mike and Paul said.

Great shot!!!!

#5 shadowdoc31

shadowdoc31

    Vostok 1

  • -----
  • Posts: 130
  • Joined: 27 Nov 2008
  • Loc: Chattanooga, TN - USA

Posted 26 October 2012 - 10:54 AM

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!

Attached Files



#6 ToxMan

ToxMan

    Mercury-Atlas

  • *****
  • Posts: 2768
  • Joined: 23 Jan 2011
  • Loc: Tucson, Arizona, USA

Posted 26 October 2012 - 11:19 AM

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

#7 kowspot2000

kowspot2000

    Viking 1

  • -----
  • Posts: 531
  • Joined: 23 Jul 2011
  • Loc: Corvallis, OR

Posted 26 October 2012 - 04:32 PM

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






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics