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Old 04-08-2009, 09:26 PM
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peter_4059 (Peter)
Big Scopes are Cool

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Oval Planetary

Here's Sunday night's imaging experiment - the Oval Planetary (thanks Peter M for putting me on to this).

This image was taken using the DSI II pro and 10" Newt. 50x1min R and B with the green channel synthesized (thanks to Noel C actions).

I was expecting to see a bit more structure in the core but I guess that was a bit optimistic given my location and the light pollution from the sky needle
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Old 04-08-2009, 09:29 PM
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multiweb (Marc)
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That's an excellent shot. Sharp as!
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Old 04-08-2009, 09:29 PM
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Peter, never heard of it! Very interesting object. Nice obscure capture.
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Old 04-08-2009, 10:21 PM
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Thanks Marc and Paul.

here's what it should look like....

http://en.wikipedia.org/wiki/IC_4406
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  #5  
Old 04-08-2009, 10:47 PM
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Peter,

Looks fantastic. Very difficult object to image and even harder to process. I think you have done a wonderful job.

Frank
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  #6  
Old 05-08-2009, 12:07 AM
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renormalised (Carl)
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The Celestial Resistor

Great shot
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  #7  
Old 05-08-2009, 12:22 AM
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Ric
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Lovely capture Peter, quite an unusual looking planetary.

Nice and sharp as well.

Cheers
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  #8  
Old 05-08-2009, 07:37 AM
Dennis
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Nice work Peter and an excellent result for a challenging object under less than ideal conditions.

Cheers

Dennis
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  #9  
Old 05-08-2009, 08:01 AM
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Hi Peter:
Very nice pic.
Many grettings
Cesar
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  #10  
Old 05-08-2009, 10:56 AM
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Love it!!

Tom
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  #11  
Old 05-08-2009, 02:40 PM
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Hi Peter,

Nice picture.

I think that you'd be struggling to get any real detail in this object without extremely accurate tracking. I images this a while ago, using an adaptive optics unit and my RCX. The result is here.

The telescopes are similar in focal length, but your stars are a bit elongated, which is either tracking or registration.

I have taken the RGB for this one, just haven't gotten around to processing it yet.

Cheers
Stuart
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  #12  
Old 05-08-2009, 06:15 PM
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Thanks everyone for the positive feedback. Stuart, I suspect I need to improve my tracking as you suggest. I've had quite a few issues with this of late. I'm looking forward to getting up to Astrofest next week to get some help tracking down the problem.

ps nice detail in your narrowband image.

Peter
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  #13  
Old 05-08-2009, 06:22 PM
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troypiggo (Troy)
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Looks like a difficult target. Think I'll leave that one for when I get off my "L" plates and "P" plates.
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  #14  
Old 05-08-2009, 06:35 PM
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Hey that's a beauty.

Greg.
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  #15  
Old 05-08-2009, 07:25 PM
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Ic 4406

Burnham, vol2, p1114 give a magnitude of 11mag, and size 100" x 35" and Uranometria, Vol3, Chart 183 gives 10.6mag(p), 10.2 mag(v) and 106"
Too faint to be included in the Webb Handbook, Vol2 "Planetary and gaseous Nebulae", but included in Vol7 "The Southern Sky", p 84, visible as a uniform glow in 10".
Hartung (1st edit.), p147: 12" shows a grey-blue 20" diffuse disk; Visible in 10.5cm and prism shows object with a 7.5cm telescope.
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  #16  
Old 05-08-2009, 08:44 PM
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Peter
I had a go at re-processing my ic4406 after seeing yours. Its difficult to get the ansae while preserving some detail in the core of this planetary, but I gave it a go. Just in case you think the details are a processing artifact Ive included a Hubble shot which is just a little clearer. If you got confused mine is on the left, Hubble on the right (didn't do mine in colour but thought a touch of Caboni would add a certain je ne sais qua). Mine has all the stars.
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Click for full-size image (hs-2002-14-a-web.jpg)
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