From: Alan Friedman <alan@greatarrow.com>
Date: April 25, 2005 4:15:55 PM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] jupiter with moons/ 4-19-05
Hi Milton -
Thanks for sharing that image from Starry Night Pro. I didn't realize that the moons showed detail when you zoom in that close. What an amazing resource. My image was from 12:16am EDT on April 19th (you made a good guess). Here is a comparison using an enlarged version of my original file:
http://www.geocities.com/alanfgag/ganymede_detail.jpg
fun stuff!
Alan
On Apr 24, 2005, at 4:04 PM, Milton Aupperle wrote:
Hi Alan;
Very nice shot.
And that sure does look like you picked up surface detail on Ganymede -
at least according to Starry Night Pro. I'm guessing you took that
image at about 12:30 ish am April 19th and here's what Ganymede should
look like then (rotated into view)
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<Ganymede.jpg>
I'll have to think about adding the manual selection ability in to Astro IIDC stacking - but it would be a lot of work.
TTYL..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1005 - 815 14th Avenue. S.W.
Calgary Alberta Canada T2R0N5
1-(403)-229-9456
milton@outcastsoft.com
www.outcastsoft.com
On 24-Apr-05, at 1:32 PM, Alan Friedman wrote:
Hi all -
I posted an image to the files area of Jupiter taken last Monday night a couple of hours
after my recent saturn image - also using an RGB filterwheel with my DMK21BF04 (the
detail comes from the red and green filtered images only). It took just over 2 minutes to
capture a set of three streams - but with seeing around 5/10 only about 380 frames from
1300 were sharp enough to use for luminance.
On the topic of alignment and stacking - this is a good example of why I prefer to select
the alignment areas manually. This image is created from three sets of stacks aligned on
the planet disk, ganymede and io. In two minutes there was little movement seen in
Jupiter's features, but aligning on ganymede allowed some markings to be seen that were
not visible in the images aligned using Jupiter's disk. Io shows considerable movement
over two minutes and would have appeared as a short line if I hadn't processed a set of
images centered on it's disk.
I am really enjoying the filterwheel - with the fast response of the settings and prefs of
Astro IIDC it works great even on Jupiter (it would have been hopeless to try this with my
ToUcam running under BTV). I hope I'll get a shot at Jupiter in good seeing conditions.
best wishes and steady skies
Alan
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