木星 ALPO-Japan Latest

Jupiter Image 2008/05/13(UT)

Sadegh ghomizadeh,John Kazanas,Mike Salway
Sadegh.GH,J.Kazanas,M.Salway

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information: telescope Celestron 9.25 Schmidt Cassegrain Focal lenght 2350 mm,focal ratio 10,
camera SKYnyx mono+2xBarlow+60mm filter wheel f 37,30fps total 3000  frames stacks
Filter: astronomik RGB,processing software: regitax & PS





[Sadegh ghomizadeh: Tehran IRAN ]

[John Kazanas,Melbourne Australia]

This set of images is from the last session of good seeing and clear skies
back on the 14th May local time. It's been horrible seeing and/or cloudy
since then. Glad to have finally made my way through the backlog of
processing.

This set of images covers 80 minutes of rotation and includes the
GRS/LRS/3rd red spot, plus Callisto's shadow. Seeing was very good but
transparency got worse as the session went along, thanks to mirrors dewing
up. The last half of the avi's were captured at 15fps as a result.
I've got some avi's of 3 of the 4 jovian moons in the same FOV, and they'll
be attached to a Jupiter image along with an animation in the next day or
two.

I've been chatting with David Pretorius regarding my processing of Jupiter
images from this year compared to last, and some comments from Gianluigi
from the WinJUPOS team have made me re-evaluate the gamma curves reduction I
was doing. On this new laptop i'm using, all images are very bright so a
curves reduction makes sense and looks good. However after the feedback and
discussions it appears that the images are too contrasty and lacking limb
detail on most other monitors. So with this set of images, they appear much
lighter to me - hopefully they'll be more pleasing for everyone else as
well.

12" newt, DMK21AU04. 30fps for the first image (in poorer seeing), 15fps for
the last two images (in very good seeing).



[Mike Salway Central Coast,NSW Australia]

ALPO-Japan Latest Jupiter Section	2008/05/14
	2008/05/12