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Venus Image 2023/03/19(UT)
鈴木 隆,佐藤康明
Siegfried Gonzi,Niall MacNeill,Manos Kardasis,Antonio Cidadao
S.Gonzi,T.Suzuki,Y.Sato,N.MacNeill,Kardasis,A.Cidadao
[Siegfried Gonzi : Exeter,United Kingdom]
[Takashi Suzuki (Hachiouji-City Tokyo Japan)]
≪東京都八王子市 鈴木 隆≫
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[Sagamihara-shi Kanagawa-prefecture Japan]
≪神奈川県相模原市 佐藤康明≫
I made several captures with IR filters (IR 642nm BP,IR 850nm BP & IR 889nm with 20nm BW). The latter of these is the Chroma Methane Band filter. Given its narrow band width (20nm) I felt that it might produce a clearer image. The other two are Band Pass filters which pass IR radiation above the specified wavelength. At the low altitude,it is quite likely that substantial atmospheric dispersion is present across the broader range of wavelengths,potentially blurring detail.
Whilst cloud patterns are visible in all the IR images,the earlier methane band image shows interesting linear features. I cannot be sure that these are not artefacts,although various sharpening regimes brought out the same structure. The latter methane band image,acquired 10 mins later,but perhaps where the seeing had declined,does not show the same level of detail.
The UV image shows a broad dark equatorial band and brighter poles,but the resolution of detail is poor.
[Niall MacNeill : Wattle Flat,NSW,Australia]
A Cloud Discontinuity is just rising from the limb which could be easily interpeted as an artefact if not noted by Antonio Cidadao in his obs. in the same date
[Manos Kardasis,Glyfada-Athens;Greece]
《カーダシス マノス:ギリシャ アテネ》
In a short period where seeing was above average. It degraded considerably when I obtained the UV image.
A Cloud Discontinuity candidate is arrowed in the first image (where the planet was further enhanced on purpose) and rotates with the atmosphere (gif between first and last images; first image was not enhanced). CD was already present on Manos images from the same day.
≪アントニオ シダダオ ポルトガル≫
[Antonio Cidadao Oeiras - Portugal]
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