火星 ALPO-Japan Latest
Mars Image 2020/09/16(UT)
大田 聡,近内令一
Yaroslav Naryzhniy,Anthony Wesley,Randy Tatum,John Sussenbach,Stanislas Maksymowicz,Damian Peach,Pascal Lemaire,Efrain Morales Rivera,Sonka Adrian,Raimondo Sedrani,Johan Warell,Kevin Quin
Y.Naryzhniy,S.Ota,Anthony.W,R.Tatum,J.Sussenbach,S.Maksymowicz,D.Peach,Pascal.L,R.Konnai,E.Morales,S.Adrian,R.Sedrani,J.Warell,K.Quin
解説（安達）/ Comment by Makoto Adachi
Anthony Wesley氏のカラー画像は、Syrtis Major (293W,+0~20）の東側に白い雲を記録している。その雲がSyrtisの東半分を
覆っている様子が非常によくわかる。この様子は肉眼でも非常によくわかる特徴的な姿である。淡い模様を濃くしすぎないように、
処理してもらうと、模様の濃さからダストベールや白雲の位置が分かる。また、模様の色合いも、大気の様子を示す重要な情報である。
Anthony Wesley氏のUV画像では上に書いた雲をターミネーター付近で見事に記録している。この画像のターミネーターの中央付近に
円形の暗斑が記録されている。これは、Hellasの北東方向にあるTyrrehenaの高地である。大気の光学的厚さが薄くなってできた暗斑
である。
SPC付近は、今日も周囲に白雲を見せている。よい観測条件で記録されたものにはArgyreの南に当たる部分は、赤っぽく、
Mare Cimmeriumの南に当たる部分は青っぽい白雲である。赤っぽい部分は、SPCからの弱いダストの吹き出しではないかと思う。
Anthony Wesley's color image records a white cloud to the east of Syrtis Major (293W,+ 0-20). It is very clear that the clouds
cover the eastern half of Syrtis. This is a characteristic figure that can be seen very well with the naked eye. If you treat the light
pattern so that it is not too dark,you can see the position of the dust veil and white clouds from the darkness of the pattern.
The color of the pattern is also important information that indicates the state of the atmosphere. Anthony Wesley's UV image
brilliantly records the clouds above near the Terminator. A circular dark spot is recorded near the center of the terminator
in this image. This is the highlands of Tyrrehena,northeast of Hellas. It is a dark spot formed by thinning the optical thickness
of the atmosphere.
White clouds are still showing around the SPC area today. The part to the south of Argyre is reddish,and the part to the south
of Mare Cimmerium is bluish white cloud recorded under good observation conditions. I think the reddish part is a weak dust blowout
from the SPC.
（by 13 observations; reported by Makoto Adachi)
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2020/09/16 00:45(UT),400mm Dall-Kirkham,ZWO 290MM,Seeing 6/10 Trans 6/10
[Yaroslav Naryzhniy : Ukraine,Kiev region]
[Tomigusuku city Okinawa Japan]
≪沖縄県 豊見城市 大田 聡≫
Some very good seeing this morning on Mars,
here's a true colour RGB image showing Syrtis Major at top,Hellas basin and the South polar Cap at bottom and Meridiani at left.
The crater Huygens is prominent near the centre of the image and Schiaparelli to the left.
The lower right of the image,ie the setting limb,appears partly obscured by dust or haze. Blue cloud is visible at the northern limb.
Through various filters in very good seeing.
I've included a composite RGB image however there is also a lot to see in some of the discrete blue channel images so I've included them as well.
The 425/50 images (400-450nm) show interesting structure when strongly enhanced,
but also in the normal Blue (400-500nm) images there is a feature visible on the setting limb in the early part of the session which was no longer visible after about an hour.
I'm guessing this is dust or some sort of transient cloud.
If you're interested in investigating any of this please let me know and I'll share the raw stacks with you.
2020/09/16 16:25 Blue
2020/09/16 18:11 UV425
2020/09/16 18:13 UV425
[Anthony Wesley,Murrumbateman Australia]
≪アンソニ オーストラリア≫
More evening clouds over the Tharsis volcanoes. One appears to be projecting slightly beyond the terminator in IR.
I used Firecapture,Registax 5 and Photoshop CS2 for processing.
[ Randy Tatum,Richmond,VA U.S.A]
[スセンバッハ:オランダ]
[John Sussenbach:Houten,Netherlands]
Here is a report of mars performed last 16th september with the 203mm cassegrain.
Average images until 22H30UT were met then becoming worst.
It was noted at the limb and at the terminator some bright area in different color channels,mostly dusty.
The planet with the naked eye without telescope looked still typically yellowish,
the contrast on planet disk lowered by an overall atmospheric veil.
[Stanislas Maksymowicz Ecquevilly,France]
[Damian Peach: Loudwater,Buckinghamshire,United Kingdom]
[Pascal Lemaire : France]
Attached here a set of images from 16 September. Between clouds session again,
better go to bed atrocious seeing. Visually,darker albedo features seems to be getting darker.
先日に続いて雲間の観測で、極悪非道、阿鼻叫喚のシーイングで、晴れ間が30秒間も続かず、ファイアキャプチャのオートヒストグラムの反応が追い付かなくて、
両手と足の指まで動員してシャッタースピード/ゲインコントロール、ピント合わせ直しを同時進行という曲芸師状態の撮像でした。疲れます。
眼視では暗色模様の濃さが回復してきているように思えます。
<<福島県石川郡石川町 近内令一>>[Reiichi Konnai : Ishikawa Gun,Fukushima,Japan]
[Efrain Morales Rivera Aguadilla:Puerto Rico]
[Sonka Adrian Bruno:Bucharest,Romania]
[Raimondo Sedrani : Pordenone,Italy]
Seeing has been very variable and only a couple of dates have allowed detailedimages to be recorded.
The August 30 image is the best yet.
I have now switched to an ASI 462MC camera,2.7x APM ED barlow
(better coated than the previous barlow with internal reflections evident) and added a 685 nm filter.
The SPC has beenretreating with internal details and ice islands at the rim,
a nearly constant haze has been present at the northern limb,
but no orographic clouds on the dates I have imaged.
No other significant activity seen,such as dust clouds.
[Johan Warell:Lindby:Sweden]
Seeing 7/10 Trans 2/10
Smoke from wildfires reduced transparency to near zero. Only the planets were visible.
[Kevin Quin:Vienna,VA,USA]
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