From: "Tim" <tjp314@pacbell.net>
Date: April 25, 2005 4:35:27 PM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Re: jupiter with moons/ 4-19-05
Okay, so when is someone going to take the first amateur image of the Great Dark Spot on
Neptune? ;o) ...but don't laugh, it's about the same size as Ganymede, just dimmer.
Uranus is starting to show cloud structure, and it's almost 4" across! ;oD
-Tim.
P.S. ...still bidding on that iBot. It's climbing!
--- In Astro_IIDC@yahoogroups.com, Alan Friedman <alan@g...> wrote:
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@o...
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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