火星 ALPO-Japan Latest
Mars Image 2020/07/20(UT)
井上 修,大田 聡,熊森照明,安達 誠
Clyde Foster,Giancarlo Rizzato,Paul G. Abel,Randy Tatum,Mike Hood,Robert Heffner,Vlamir da Silva Junior
C.Foster,G.Rizzato,P.Abel,R.Tatum,M.Hood,O.Inoue,S.Ota,R.Heffner,T.Kumamori,M.Adachi,V.da Silva Jr.
解説（安達）/ Comment by Makoto Adachi
Clyde Foster氏の画像では、ミッチェル山のある地域の東側がダストに覆われている様子が記録されている。おそらく、後方のSPCの
割れ目の部分から昇華された気流が、砂を巻き上げて、中緯度方向に吹き出しているためだろう。画像をよく見ると、その様子も記録さ
れている。SPCの周囲はいずれもダスティーだが、この地域やMare Sirenum (140Ｗ~170Ｗ,-30)などから噴き出し、ＳＰＣ周辺の
気流によって、全周に広げている様子がうかがえる。
Mike Hood氏の画像はＳＰＣの縁の様子がよく記録されている。中央左のＳＰＣのダークフリンジが見えなくなっているのは、この部分で、
ＳＰＣからの吹き出しが記録されているものと思われる。井上氏の画像ではMare Sirenum (140Ｗ~170Ｗ,-30)の北側に明るくなった
部分を記録しているが、前日に見られたＳＰＣの吹き出しの影響でできた、エッジダストストームである。太田氏の画像では、ＳＰＣを取り
巻くように、ダスティーな地域が見える。日本からの観測ではＳＰＣが白く飛ばないような処理が行われており、非常に助かる。
Mr. Clyde Foster's image shows dust covered the eastern part of Mount Mitchell. Probably because the airflow sublimated
from the rear part of the SPC cracked up the sand,blowing out in the mid-latitude direction. If you look closely at the image,
it is recorded. Dusty is all around the SPC,but it can be seen that it spouts from this area and Mare Sirenum (140W to 170W,
-30) and spreads all around by the air flow around the SPC.
Mr. Mike Hood's image often shows the edge of the SPC. The dark fringe of the SPC in the center left is invisible,and it is thought
that the balloon from the SPC is recorded in this part. In the image of Mr. Inoue,the bright part on the north side of Mare Sirenum
(140W to 170W,-30) is recorded,but it is an edge dust storm created by the influence of the SPC blowing seen on the previous day.
In the image of Mr. Ota,the dusty area can be seen as if it surrounds the SPC. Observations from Japan have been carried
out so that the SPC does not fly white,which is very helpful.
（by 10 observations; reported by Makoto Adachi)
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Image set from this morning with Syrtis Major approaching the terminator at left,
S Sabeaus and S Meridiani extending across the centre towards the right and Hellas at upper left.
I believe it is the Mitchell Mons that can be seen as separated from the main polar cap.
The condition of Deltonon S,situated between Syrtis Major and S Sabeaus,was recently noted by Damian Peach.
Although there is a general sense of dustiness,the IR shows some detail in the albedo features.
[Clyde Foster:Centurion,South Africa]
02:48:11(UT)
[Giancarlo Rizzato : Marano Vicentino (Vicenza) ITALY]
Conditions were not good- drifting cloud was a continual nuisance and the seeing,initially at AII quickly dropped to AIV.
Still,a number of interesting points were visible:
- The south polar cap is still large and bright,in the moments of good seeing I could see some darkish material in the cap. The surrounding Lowell band was probably the darkest feature on the disk,and is now rather irregular rather than a uniform band.
- The Hellas basin was seen- due to the poor conditions it is hard to be sure but it seems as though there was dusk/cloud activity in the basin (although it didn't appear to be bright)- this probably extended into Noachis but it is hard to be sure.
- Hellespontus and Pandorae Fretum visible but rather weak.
- The Syrtis Major was rather muted,it's prec. side seemed to be darker- overall one is left with the impression that there is still a lot of dust in the Martian atmosphere and this is making the albedo features appear much less striking.
I was hoping to make a second drawing using my 12" Newtonian,but by 0243UT the clouds obscured Mars and in any case the sky was now getting rather light.
[Paul G. Abel:Leicester:United Kingdom]
I used Registax 5 and Photoshop CS2 for processing.
[ Randy Tatum,Richmond,VA U.S.A]
Good seeing for these images but variable transparency.
[Mike Hood : Kathleen Georgia,U.S.A.]
今朝も薄雲を通しての撮影で、ＲＧＢ撮影後すぐに完全に曇ってしまいました。
≪大阪府 枚方市 井上 修≫[Osamu Inoue. Hirakata-shi,Osaka,Japan]
[Tomigusuku city Okinawa Japan]
≪沖縄県 豊見城市 大田 聡≫
Clouds everywhere,but was able to get in a first light image finally this season.
Martian atmosphere seemed hazy but most features were still readily observable in the telescope.
[Robert Heffner:Osaka,Japan]
ホントに久しぶりの火星です。今年の梅雨は晴れ間がありません。
≪大阪府堺市 熊森照明≫[Teruaki Kumamori:Ohsaka Japan]
今日も高層雲が一面に広がり、透明度は極めて悪い。しかも最終的に曇って中止になってしまった。
気流はさほど悪くはなかったが、細部は見えない状態だった。
青の光（B47)で観測すると、特に晴れている部分はなく、全体が薄明るく見えた。
ダストのベールが淡くなったように思ったが、B47で見る限りはそれほど晴れている様子はなかった。
ソリスの位置には淡く雲があるらしく、かなり見えにくい状態だった。
When observed with blue light (B47),there was no particularly clear part,
and the whole looked dim. I thought the veil of dust had faded,
but it didn't look so clear on the B47. It seemed that Solis's position was
pale and cloudy,and it was very hard to see.
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≪滋賀県 大津市 安達 誠≫[Makoto Adachi:Siga Japan]
[Vlamir da Silva Junior : Sao Paulo,Brazil]
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