火星 ALPO-Japan Latest
Mars Image 2020/09/02(UT)
Jorge Rallo,Damian Peach,Efrain Morales Rivera,Pozharov Alexey,Paulo Casquinha
解説（安達）/ Comment by Makoto Adachi
ていた領域がSolis Lacus (W90;-28)方向に少し広がったように見える。
Pozharov Alexey氏は、Arsia Silva Mons (W120,-3)
Damian Peach's image shows that the limb's equator is fairly white. From now on,low latitude water ice clouds will be visible.
This position is located in a high altitude area,and conditions that are likely to occur are in place. Kumamori succeeded in imaging
under the worst conditions. The area that had been clear on September 1 seems to have spread slightly toward Solis Lacus (W90;-28).
Mr. Pozharov Alexey tracked over time that Arsia Silva Mons (W120,-3) was sinking. It's difficult to do with images. You can see
how the shadow of the mountain enters the terminator.
（by 5 observations; reported by Makoto Adachi)
[Jorge Rallo : Madrid,Spain]
Here is an image from Sep 2nd using the 50cm Cassegrain. Frequent low clouds but good seeing.
Elysium region on view. Note Elysium Mons is visible toward the terminator.
[Damian Peach: Loudwater,Buckinghamshire,United Kingdom]
≪大阪府堺市 熊森照明≫[Teruaki Kumamori:Ohsaka Japan]
[Efrain Morales Rivera Aguadilla:Puerto Rico]
Report and sketch of the dynamics of shadows and clouds from 3.09.
Stavropol,roof of a six-story building,Newton 20 ",Astrosib main mirror,Oradius secondary mirror,ES HR coma corrector,5.5 mm ES 100 eyepiece,433x magnification
Seeng 1 by Antoniadi.
The edge of the disk is sharp,the terminator is looser,Mars is orange,the highlights are sandy-yellow,the polar cap is white,
the northern one has a blue tint,the cloud (or is it the volcano itself?) Arsia is yellowish so far on the disk,the size of about a third of the southern polar cap,
maybe a little more,tilts south towards the terminator,when on the terminator it becomes smaller and white.
At 2.14 Moscow time,a light yellowish spot is quite far from the terminator,and already closer to the thermnator,to the north of the spot below,there is a darkening.
Further,the darkening grew in size and at the same time a depression appeared on the terminator,at first it was drop-like,as it had two nights before,
then the angle under the spot became sharper,the shadow blackened,at 2.39 Moscow time the shadow was the maximum size,with a sharp protrusion under the spot. At 2.48,
the notch-ledge began to round off,at 2.52 to the north of the light spot,a thin black stripe ceased to be distinguished,the notch-ledge became in the form of a ditch channel,
from the south the slope was more gentle,the light spot approached the terminator. At 2.56,the notch in the terminator became a semicircle,a thin black line.
At 3.25 the terminator almost leveled off,the light spot is almost invisible. At 3.40 a white sparkle became noticeable right on the terminator,in a small cup-shaped ledge,a
s if it were a pearl in a cup. At 4 o'clock,barely visible,the terminator straightened out again. This is the last time that something happened in this area,the size of the south polar cap.
On the limb,judging by the recording on the recorder from 2.14 Moscow time,an extensive thin biconvex lens of a bluish-white glow was also distinguished,that is,
both the thermnator and the disk of Mars were lightened. It was observed for a long time,until half past three.
Note that the shadow from the volcano,or is it a shadow in some kind of depression around the volcano,is much blacker than the end of the mainland. Therefore,there is no doubt that it is a shadow.
[Pozharov Alexey : Stavropol City,Russia]
(site: 38.567 N /8.933 W Alt 124 m)
[Paulo Casquinha Palmela,Portugal]