土星 ALPO-Japan Latest
Saturn Image 2010/03/18(UT)
阿久津富夫
Anthony Wesley,Christopher Go,Jose Antonio Soldevilla
Anthony,Christopher Go,T.Akutsu,J.A.Soldevilla
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Anthony Wesley (406mm Newton) |
Here is my first opportunity to image the new storm in Saturns southern hemisphere,in average-to-good seeing this morning for a short while. It shows up clearly in this image,in fact it looks like two storms that are close together,separated only slightly in longitude
I've been a bit more aggressive with the enhancement in this image so that the storm(s) are clearly shown as well as various cloud detail around the equatorial region. Rhea is visible above the rings to the right hand side.
Here is a closeup from the previous image,showing (I think) two storms close together in longitude,or perhaps one storm with two discrete lobes.
I have gone back and reprocessed the image from yesterday that shows the SED storm,in particular I was looking for evidence that my processing may have been faulty and showing two storms where there should only be one. There are a couple of candidates for errors that might show this - primarily the multipoint alignment in registax might have been faulty and caused some sort of double-image effect. I thought it unlikely,but the only way to know for sure was to reprocess the data with total focus on the region containing the storm and this time using only a single alignment point so there could be no possibilities that this is a multipoint alignment error.
So here is the attached result,showing the red and green channels (blue does not show anything useful).. This is the image as it comes out of registax + deconvolution in Astra Image + unsharp mask in the Gimp. Although the storm system is only vaguely seen as two in the red channel I think it's pretty clear in green that there are either two lobes to the one storm or there are two separate storms. The images have been heavily enhanced by unsharp masking to bring out the selected details.
Note I upsample my original data by 1.5x before processing,and that's how I've left it here,normally I would downsample it by some amount after this point to remove some more spatial noise.
The clarity of Rhea is also an indicator that there is no spatial alignment or processing errors in the images.
[Anthony Wesley,Murrumbateman Australia]
≪アンソニ オーストラリア≫
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Christopher Go (Celestron C11) |
Seeing was rather poor this evening. Saturn was still low and I was unable to cool my OTA because of rain.
[Christopher Go : Cebu Philippines]
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Tomio Akutsu (355mmSC C14) |
土星白斑（SED storm)画像ですが、気流が安定せず、ぼやけています。
白斑の前方がやや南に下がっています。大きさは約10度です。
≪Cebu PHILLIPINES 阿久津富夫≫
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Jose Antonio Soldevilla(Newton 250mm) |
[Jose Antonio Soldevilla Canyelles-Barcelona-Spain]
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