１月１３日に見られたアキダリウム（Mare Acidarium;30W,+50)
南東の明部はさらに東へ移動し、シドニア(Cydonia;350W,+50)付
近を広く覆っている。白雲なのかダストなのかはメモに様子が書
かれていないのでよくわからないが、この位置は暗色模様との境
界付近で、よくダストの発生する位置にあたるため、ダストであ
る可能性が高い。両極付近は明るいようだ。また、１月１３日で
も書いたが、マルガリティファー(Sinus Margaritifer;20W,-10)
は眼視ではやはり淡くなっているようだ。

The light part in the southeast of the Mare Acidarium(30W,
+50) which was seen on January 13rd moved to the east. Then,
it covers the neighborhood of the Cydonia(350W,+50) widely.
It doesn't know that it is white cloud or dust because there
is not a record in the note. Near this, it is the place where
dust occours well. It occurs well on the light desert and in
the border with dark pattern. This light part will be dust.
It is bright together near the South Pole and North Pole.
Like january 13rd, Sinus Margaritifer(20W,-10) seems to
become light.

FROM Makoto ADACHI
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Simulated by Ikemura

ALPO-Japan Latest Mars Section