火星 ALPO-Japan Latest

Mars Image 2021/04/23(UT)
伊藤了史,安達 誠
Stanislas Maksymowicz,Raimondo Sedrani
S.Ito,M.Adachi,S.Maksymowicz,R.Sedrani

下記リンクをクリックにて安達氏のコメント(PDFファイル)が開きます。 Click the link below to open the Comment(PDF File) by Makoto Adachi on a new page. 解説(安達)/ Comment by Makoto Adachi
Satoshi Ito

≪愛知県  春日井市  伊藤了史≫[Satoshi Ito. Kasugai City,Aichi,Japan]

Makoto Adachi
若干早めに観測がはじめられた。時間的に余裕があって、フィルターを使った観測を今日も取り入れた。
黄色のフィルターで見るのと緑のフィルターで見るのとでは見え方が大違いで驚いた。Hellas東部のAusonia付近がかなり暗く見えた。
暗い模様があるのか、その東西に明るい部分があるため、相対的に黒く見えているのかの判別はつかないが、緑とは明らかな違いがあった。
シーイングがよくなく、細部は分からないが、大きな傾向だけでも、明らかな違いだった。
 (Eridania;200~230W,-35~-55)付近が明るいのは、もともと赤っぽい地域だから黄色では明るく見えたのではないかと思われる。
一方、Hellasはの時期ダスティーであることが多いため、黄色で明るく見えてもおなしくない。

Observations began a little earlier. I had time to spare,so I adopted filter-based observations today.
I was surprised that there was a big difference in how it looked when viewed with the yellow filter and when viewed with the green filter.
The area around Ausonia in the eastern part of Hellas looked quite dark.
It is difficult to tell whether it looks relatively dark because there is a dark pattern here or there are bright parts to the east and west,
but there was a clear difference from green.
The seeing wasn't good and I don't know the details,but the big trends alone made a clear difference.
The area around (Eridania; 200 ~ 230W,-35 ~ -55) is bright because it is originally a reddish area,
so it seems that it looked bright in yellow. On the other hand,Hellas is often dusty at this time,so it's okay to look bright in yellow.
 

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≪滋賀県  大津市  安達  誠≫[Makoto Adachi:Siga Japan]

Stanislas Maksymowicz
Here is a mars report performed with the 235mm cassegrain under average images.
Brightenings were plotted against the main features.
Chryse-Xanthe bright towards the limb hazzy, both poles bright, Argyre too.
Solis Lacus and surroundings were well seen but without apparent brightenings〓around.
The Arcadia area exhibited slight dark albedo which are not ghost.

[Stanislas Maksymowicz  Ecquevilly,France]

Raimondo Sedrani

[Raimondo Sedrani : Pordenone,Italy]

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