Saturn hemisphere emerging from the Cold
Taken by Dominique Duchesneau on June 12, 2021 @
Semnoz, France
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Camera Used: Unavailable Unavailable
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Details:
Saturn hemisphere emerging from the Cold
On this picture of Saturn obtained on June 12th 2021, one striking feature appearing after the full usual image treatment was the
colour aspect of the southern hemisphere just below the rings. It appears blue instead of the usual golden, yellowish tinge. My first impression was
that it was a problem in the image treatment but the results with 5 different videos recorded the same day and different settings showed the same.
Having gone through some search, one hypothesis found is that Saturn’s southern hemisphere is presently moving from winter to spring season.
The hemisphere experiencing winter on Saturn gets especially cold because –
it’s not only tilted away from the sun – but also falls under the shadow of the rings for several earthly years.
The cold causes the clouds in that hemisphere to cool and sink. The upper atmosphere is covered with very tiny and lightweight aerosols
that scatter the shorter wavelength blue light rays more effectively in the same way Earth’s sky does, giving the region its blue appearance.
C8 + barlow x2 + ADC + camera ZWO ASI 224MC. Video capture with gain of 374 and exposure time of 35msec.
The final picture is obtained from stacking about 8000 images with Registax.
Photographer's website:
No URL provided.
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