火星 ALPO-Japan Latest
Mars Image 2022/12/09(UT)
和田 繁,米山誠一,佐藤康明,三品利郎,伊藤了史,金井康哲,森田光治,井上 修,鶴海敏久,安達 誠,尾崎公一
Eric Sussenbach,Pericles Enache,Anthony Wesley,Tiziano Olivetti,Clyde Foster,John Sussenbach,Chris Nuttall,Xavier Dupont,Con Kolivas,Christophe Pellier
E.Sussenbach,SH.Wada,S.Yoneyama,Y.Sato,T.Mishina,S.Ito,Y.Kanai,P.Enache,Anthony.W,M.Morita,T.Olivetti,O.Inoue,T.Tsurumi,C.Foster,J.Sussenbach,C.Nuttall,X.Dupont,C.Kolivas,M.Adachi,K.Ozaki,Christophe.P
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Click the link below to open the Comment（PDF File） by Makoto Adachi on a new page.
解説（安達）/ Comment by Makoto Adachi
[Eric Sussenbach : [ Willemstad,Curacao (Dutch Caribbean)]
昨夜より少し厚めの薄雲を通しての撮影だったが、シーイングは今夜もまずまずだった
[Shigeru Wada: Takatsuki City,Osaka,Japan]
≪大阪府高槻市 和田 繁≫
週末になり、衝直後の火星をじっくり撮影と思っていたけど、薄雲が広がり出し、慌てて撮影。
可視光に続いて近赤外を写した段階で火星は肉眼で辛うじて見える状態。
Ｂ画像は諦めでした。シーイングも悪く、撮影したよのレベルです。
≪神奈川県横浜市 米山誠一≫[Seiichi Yoneyama:Kanagawa Japan]
2カット撮って曇ってしまいました。
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[Sagamihara-shi Kanagawa-prefecture Japan]
≪神奈川県相模原市 佐藤康明≫
≪神奈川県 横浜市 三品利郎≫[Toshirou.Mishina:Kanagawa Japan]
≪愛知県 春日井市 伊藤了史≫[Satoshi Ito. Kasugai City,Aichi,Japan]
Seeing:3/10,Trans:4/5,
撮影中模様は見えていて、一番揺れが少ないところに合わせたのですが、全然ダメでした。
The seeing was bad,and I could only roughly see the pattern of Mars.
[金井康哲 : Yasunori Kanai,Sagamihara City,Kanagawa,Japan]
[Pericles Enache,Sao Paulo,Brazil]
Mars image from just after 1am local time this morning in reasonable seeing. 5 separate runs in each of R,G,B were combined in WJ to make this image.
[Anthony Wesley,Murrumbateman Australia]
≪アンソニ オーストラリア≫
シーイングがよくないので，画像は不鮮明である。北極付近に広がる雲が明瞭である。
Seeing is not good,so the image is blurred. Clouds spreading near the North Pole are clear.
≪滋賀県守山市 森田光治≫[Mitsuji Morita:Siga Japan]
Good transparency and below average seeing. The North polar cap is visible.
Sum of 4 RGB sets,total 23 minutes.
［ティジャノ:オリベッティ バンコック タイ］
[Tiziano Olivetti : Bangkok Thailand]
雲を通して火星がぼんやり見えていたので撮りましたが、ＩＲ以外のカラーフィルター撮影は諦めました。
≪大阪府 枚方市 井上 修≫[Osamu Inoue. Hirakata-shi,Osaka,Japan]
≪岡山県岡山市 鶴海敏久≫[Toshihisa Tsurumi:Okayama-City Okayama-Prefecture Japan]
Image set from last night where conditions appeared reasonable after the regular evening breeze had died down. The timing was good as Mars’ appearance from behind one of the trees in the garden here coincided with the end of the 2nd football world cup quarter final of the evening.
Solis Lacus is at upper left with the Valles Marineris canyon complex extending in from centre left. Olympus Mons is at lower right.
[Clyde Foster : Khomas,Namibia]
Here the technical information.
Mars on 9 December 2022 at reasonably good seeing. I show the results of two different processing procedures of 3 SER files of 10.000 frames each.
The left image was obtained in the classical way. The best 10% of the frames was stacked with Autostakkert. The three final stacks were derotated and combined WinJUPOS.
The right image was obtained bij derotating 3 SER files in WinJUPOS. The best 10% of the frames of the derotated SER files were stacked with Autostakkert. The three final stacks were derotated and combined with WinJUPOS.
The difference between the two images is small,but,in general,the result obtained with the derotated SERs is sharper than the classic result. In particular,the cloud pattern at the Northpole is more detailed in the derotated image.
[スセンバッハ:オランダ]
[John Sussenbach:Houten,Netherlands]
I was lucky,I had clear skies and good seeing right until I decided to pack up,then in the space of 5 minutes a blanket of cloud sped in from the west totally covering the sky.
Haze in the south,particularly the south west
Evening mist in Chryse at the limb.
Morning mist north and south of the equator.
NPH looking a little irregular with a dark patch showing through in the east.
A very subtle hint of Olympus Mons,but right at the limit of visibility
[Chris Nuttall : York,UK]
[Xavier Dupont,Saint-Roch France]
Seeing 5/10
[Con Kolivas : Melbourne,Australia]
シーイングはじわじわとよくなったが、中程度でとまってしまった。火星のターミネーターが西に移り、若干暗く感じられるようになった。
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≪滋賀県 大津市 安達 誠≫[Makoto Adachi:Siga Japan]
[Ki.Ozaki,Sobue Inazawa Aichi JAPAN]
≪愛知県稲沢市祖父江町 尾崎公一≫
Some very good seeing for my first Mars observation for the current season... just past opposition day.
These images show what was once known as the "blue clearing", when the dark markings become visible in blue lights - even in UV, there. This is now recognized as an "opposition effect" a photometric surge as the solar angle is closing to zero when the planet opposes the Sun as seen from Earth. This must increase the luminosity of the deserts noticeably more than that of the dark markings, reviving a level of contrast high enough for the latters to become visible again (btw I am also currently making some basic photometry and the planet looked to have been very bright).
At high solar angle (quadrature), the level of contrast falls to zero, and even reverses in the UV, making the dark marking bright and not dark. I also attache one of my set from 2020 at the same longitude, to compare.
Apart of this the south polar hood is growing as the equinoxe approaches
(26/27 Dec.) ; the band of clouds where also observed in 2007 and 2021 at the same martian season. The futur spring north polar cap is now largely free from the hood, although it is less visible at these longitudes.
Here is the last part of my prolific night of observation from early December. This is the geometric albedo of Mars in various bands, calculated from stars observed at the same airmass through differential photometry corrected by transformation of magnitudes and colors.
All value look a bit brighter than the normal, which could be the sign of the opposition surge effect - despite the fact that the B band is right on historical track, and not particularily bright.
The sloan u' is largely just an experience ; the band encounters various limitations, uncertainty of the catalogue magnitudes of the stars, effective passband limited to 340/350 nm... Despite this the value obtained is less than 2 hundreds of magnitude from the expected value.
The B425 is a non photometric filter for which no references are available. But considering that its passband is fully comprised into that of the B filter, almost with the same center of transmission, custom references have been inferred from the B values directly through differential photometry and no color terms. The value < to 8% is coherent with what could be expected from a filter whose passband is centered on a slightly dimmer part of the planetary's spectrum than that of the broader B filter. I think it should be possible to calibrate the the B436/10 filter with the same method :)
Attached is also a set of photometric images just psf-processed. The completely processed images have been sent already.
[Christophe Pellier Bruz City,France]
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