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Saturn Image 2009/02/15(UT)
Christophe Pellier,Marc Delcroix,Willem Kivits
Christophe.P,M.Delcroix,W.Kivits
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Christophe Pellier (250mm Cassegrain) |
Some images taken under very good to excellent seeing,but again unfortunately fair transparency (high clouds).
I'd like to bring your attention to the colors of the southern hemisphere... it really looks to turn quite bluer now ! This is also visible on many images,although sometimes exagerated,but this change looks true. Is this a kind of pre-equinox phenomenon ? If I'm not mistaken,blue on Saturn means that the higher blue-absorbing layers have vanished (or thinners)...
Also note some spots on the high contrast red images (arrowed). Enceladus is transiting on the last R image,with its shadow,but I don't see anything.
Best wishes to everyone
[Christophe Pellier Bruz City,France]
Here is a Saturn under average seeing,with unfortunately defective green and blue layers (might be due to the aperture glass freezing).
No spot visible there,please note that the so called "CH4" image was
done with a non narrow filter (FWHM=50nm),showing the north pole
totally disappearing (maybe we go down to the methane cloud layer there) ...
And just for fun a composite of 3 images with different luminosity
settings,showing from left to right Iapetus,Hyperion,Dione,Tethys,
Enceladus,Saturn,Rhea and Titan :
[Marc Delcroix Tournefeuille,France]
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[copyright(c)2006 Willem Kivits:Siebengewald Netherlands]
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