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Venus Image 2020/03/11(UT)
佐藤康明
Javier Beltran Jovani,Joaquin Camarena,Luigi Morrone,Pedranghelu Sauveur,Michel Deconinck,Manos Kardasis
Y.Sato,Javier,J.Camarena,L.Morrone,P.Sauveur,M.Deconinck,Kardasis
シーイングは良いとは言えませんが透明度は良かったです。
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[Sagamihara-shi Kanagawa-prefecture Japan]
≪神奈川県相模原市 佐藤康明≫
[Javier Beltran Jovani:Castellon-Spain]
[Joaquin Camarena:Spain]
[Luigi Morrone : City Agerola Italy]
2020/3/11 18:09:18()UT),200mm Schmidt-Cassegrain,
Asi290mm,Barlow 1.8 TV,Seeing : 6/10 Trans : 7/10
[Pedranghelu Sauveur : Afa,Corsic]
Seeing 9/10,Trans 9/10
[Michel Deconinck : [Artignosc-sur-Verdon,France]]
On March 11th,2020 I captured in the IR band (~900nm) a long dark vertical feature (followed by a brighter streak),
suspected to be a Cloud Disconinuity(CD) event. Previous captures presented no signs of the event.
I confirmed it's existence on March 21st. I send an alert to worldwide observers in order to observe in the coming days.
The feature gradually presented in many other amateur images. From preliminary analysis:
(a) the current CD event is the largest observed so far in the dayside of Venus,
(b) it is placed between ~30°N- 30°S with an average size of ~5500X500km,
(c) the average zonal speed of the CD front is faster than the average speed of middle clouds found by AKATSUKI 2016 observations
(d) the phenomenon is not related with upper clouds from UV observations
(e) It is almost verical to equator
(f) It is still observable but is very hard to catch in current phase.
So here is the first detection of such a planetary scale event:
[Manos Kardasis,Glyfada-Athens;Greece]
《カーダシス マノス:ギリシャ アテネ》
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