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Mars Image 2016/03/03(UT)
遠藤宏次,堀内 直,安達 誠
Clyde Foster
Clyde,K.Endo,T.Horiuchi,M.Adachi
解説（安達）
Clyde Foster氏の画像は、注目されるHellasの東の様子を記録している。雲の広
がり方は、3月1日の様子と、大きな違いはない。ＩＲの画像のため、判断は難しい。
日本では堀内氏が様子のよくわかる画像を報告してこられた。それによれば、前日の
3月2日とほとんど変わるところがない。遠藤氏の画像は、肉眼で見たイメージに非常に
近い。
The image of Mr. Clyde Foster recorded an east state of Hellas
where I paid attention to. There is no great difference between
the expanse of the cloud and a state of March 1. For an IR image,
the judgment is difficult.
Mr. Horiuchi reported the image to understand well of the state
in Japan. According to it, there are not March 2 of the day before
and a place to almost change. The image of Mr. Endo is very near
the image that I saw in visual observation.
（by ３ observationｓ ;reported by Makoto Adachi)
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Mars IR capture from this morning. I am not sure what has happened,but I seem to have picked up a problem with the colour on my ASI224MC,so am not in a position to submit a colour image today. I will try and resolve as a matter of urgency.
Contrast arc/rind note: I also attach a sharpened image where I have not removed the contrast arc. On my last imaging session (1 March),towards the end of the session I slewed the scope to the other side of the mount,as Mars is approaching the meridian during the early morning sessions. Unfortunately the camera cable came under tension and pulled out of the camera(I hadn't had a cup of coffee yet….). I am not sure if the camera was damaged somehow,hence the colour problem this morning? However,note that the contrast arc this morning is very evident in the IR image,but is OUTSIDE the limb. The inside of the limb appears good,and unaffected by contrast arc,although the limb itself is maybe not as sharp as usual. This is obviously a much more favourable situation to deal with as it is easy to remove,and does not influence the detail on the planet. The factors that I can think of that have changed:
a)The scope was swung across to the other side of the mount,so the orientation of the main optical train has also swung over?
b)Mirror flop? However,I do keep the mirror locked as I use an electric focuser.
c)I flipped the X and Y axes in Firecapture to keep my normal orientation on the screen. However,this should not impact on the arc in any way?
d)When I slewed across and the cable came under tension,I am aware that I have some very small play in the imaging train. ie from the rear mount on the scope,the barlow and the filterwheel. It is possible that the alignment of this imaging train was adjusted slightly with the tension. The camera is screwed firmly into the filterwheel,so there is no play there.
Any comments on this are welcome(Martin,Roger,Jim?). I go along with the diffraction theory as proposed,but I think this may also hint at optical alignment as a factor? Either way,this,in my mind,is a better situation to deal with compared with the inner arc.
[Clyde Foster:Centurion,South Africa]
|
Koji Endo(200mm Catadioptric) |
シーイングが悪く顕著な模様が無い面なのでピント合わせに苦労しました。
≪埼玉県越谷市 遠藤宏次≫[Koji Endo : Saitama Japan]
|
Tadashi Horiuchi(300mm Newtonian) |
《京都府宇治市、堀内直》[T.Horiuchi: Uji- City Kyoto Japan]
|
Makoto Adachi (Drawing: 310mm Newtonian) |
非常に良いシーイングでの観測となり、800倍をかけて観測した。
かなり細かなところまで観測で来た。
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≪滋賀県 大津市 安達 誠≫[Makoto Adachi:Siga Japan]
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