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 Post subject: Jupiter imaging workshop on 1st March
PostPosted: Thu Feb 25, 2016 8:34 am 
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What's the plan for next Tuesday's session?
As Jupiter will be below 20 degrees elevation until after 8:30pm, perhaps we could start with an indoor session to discuss the techniques?

I could explain the method I use with an old Philips webcam, and demonstrate the image-processing steps using my data from earlier in the week:
http://www.boltonastro.co.uk/forums/viewtopic.php?f=1&t=856

Could anyone else cover the use of other cameras (particularly Canon DSLRs in cropped-video mode), and perhaps Atmospheric Dispersion Correction?

Then if we're lucky with the weather, we could go outside and try it for real?


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Thu Feb 25, 2016 8:51 am 
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Good point Ross

Well Orion should still be visible from the carpark before Jupiter appears, perhaps we could get the Atik Camera up and running on M42 or even M31 for anyone who is interested, this could be run in tandem with any workshop.


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Thu Feb 25, 2016 11:32 am 
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Good idea - I've not seen the Infinity wonder camera running yet.
I'll bring the ADC along plus a few slides about it for if it's cloudy.


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Mon Feb 29, 2016 2:39 pm 
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rwilkinson wrote:
I could explain the method I use with an old Philips webcam

I've compiled a brief list of "top tips" for imaging planets with a webcam:
http://www.boltonastro.co.uk/members2/index.php/fp/Workshops/Planetary-imaging-with-a-webcam/


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Tue Mar 01, 2016 10:35 pm 
Hi Ross, great tutorial tonight. I too was out last tuesday imaging Jupiter with my Ms lifecam. Thought id try out your processing techniques. Could I request that Cmd prompt for RGB alignment.

Cheers


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Tue Mar 01, 2016 11:47 pm 
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Nice one Ross and once again your use of IRIS was inspiring. I will have a go but with the camera I got from Opticstar and see how I get on

Thanks


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 Post subject: Re: Jupiter imaging workshop on 1st March
PostPosted: Wed Mar 02, 2016 11:55 am 
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MRobson wrote:
Could I request that Cmd prompt for RGB alignment.

Certainly Mick, it's in the Software section of our document library:
http://www.boltonastro.co.uk/members2/index.php/fp/Software/ALIGNPLANET.PGM/

Just download it into a folder for your IRIS script-files (e.g. C:\Astro\IRIS\Scripts\) and make sure that this folder is selected on your IRIS File.. Settings menu:
Attachment:
settings.jpg
settings.jpg [ 54.08 KiB | Viewed 4824 times ]

Then you can run it by typing RUN ALIGNPLANET <SIZE> from the command console:
Attachment:
console.jpg
console.jpg [ 11.22 KiB | Viewed 4824 times ]
Where the variable <SIZE> must be a power of 2 (i.e. 32, 64, 128, 356, 512, etc.) which is larger than the width in pixels of the planetary disc in your image.

I used IRIS's PREGISTER command:
Quote:
Performs the registration of planetary images.. ..using an intercorrelation method.
The size for the intercorrelation is given by [SIZE]. It must be a power of 2 (128, 256, 512...). The size should be larger than the planet diameter.
Before use PREGISTER define a selection rectangle around the planetary disk (drag with the mouse). Note that the size of rectangle is not important (the rectangle mark only the center of interest of the image).

And my script also includes the line MULT 0.5, to halve the image intensity, so preventing mathematical overflows at the Wavelet processing stage.


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 Post subject: Re: Jupiter imaging
PostPosted: Wed Mar 02, 2016 4:14 pm 
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MRobson wrote:
I too was out last tuesday imaging Jupiter with my Ms lifecam.

Were you using that camera at the prime focus of your 80ED (i.e without any further magnification)? If so, Jupiter's disc would be rather tiny on your sensor.
It may be worth trying eyepiece projection with one of your Hyperion eyepieces to increase your effective focal-ratio up to f/20 - f/30?
http://www.astronomysource.com/2011/10/13/eyepiece-projection/


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