火星 月惑星研究会 関西支部
Mars Image 2005/10/28(UT)
米山誠一,三品利郎,福井英人,畑中明利,
Clay Sherrod,Joel Warren,Fattinnanzi Cristia,Brett Turner,Cristina Cellini,Hubble Space Telesc
S.Yoneyama,T.Mishina,H.Fukui,A.Hatanaka,Clay,J.Warren,C.Fattinnanzi,B.Turner,C.Cellini,HST
解説（安達）
アルギレ(Argyre;30W,-50)付近のダストストームは終息してきました。一方
２７日にはっきりした、メリディアニ(Meridiani;0W,-5)付近のダストストーム
は非常に明るくなりました。発生地点の確認はできませんでした。P. Clay
Sherrodは、HSTの画像に近いイメージの記録を撮りました。このダストストー
ムは、これから南に拡がって行くものと思われます。アキダリウム(Mare
分的に目立っています。Fattinnanzi Cristianの画像では、いままで明るくな
かった地域で、NPHが目立ってきている様子を記録しています。
(reported by 9 observers and HST)
Dust storm in the vicinity of Argyre (30W,-50) has ended. On the other
hand, clearly on the 27th.
Dust storm in the vicinity of Meridiani (0W,-5) has lightened very much.
The generation point was not able to be confirmed. P. Clay Sherrod took
the record of an image near the image of HST. It seems that this dust
storm will extend to the south in the future. White clouds of Mare
Acidarium (30W,+50) seem not to be so bright. The morning mist is
partially remarkable at the dawn. In the image of Fattinnanzi Cristian,
the appearance where NPH stands out has been recorded in a region that
was not bright up to now.
(reported by 9 observers and HST)
FROM Makoto ADACHI
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Seiichi Yoneyama(200mm F4 Newton,ToUcam PRO)
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アルギューレ付近ではダストストームは、収束した様です。
オーロラ湾から子午線湾付近のダストストームは濃くなっている感じで、かなり目立つ状態でした。
今後の変化が楽しみです。こちらはまだ快晴ですが、睡魔に負けてしまいました。
≪神奈川県横浜市 米山誠一≫
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Toshirou.Mishina (200mm Newtonian, ToUcam Pro)
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It is calm around here. このあたりは静かです。
≪神奈川県 横浜市 三品利郎≫
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Hideto Fukui (250mm Dall Kirkham, Philips ToUcam Pro)
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[Hideto.Fukui (Shizuoka-Prefecture Japan)]
≪静岡県藤枝市 福井英人≫
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Akitoshi Hatanaka (400mm Cassegrain, ToUcam Pro)
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45cm Cassegrain(F15) ( kumano nature center)
+2X barlow ( f=12000mm)
IR block Filter Philips ToUcam Pro Rezistax 3
seeing 2-4/10 trans 5/10
仕事の合間をぬって撮影した。 一仕事すませている間に
曇ってしまった。
低空だったので、ゆれが激しかった。
子午線湾とオーロラ湾の間に、かなり明るく見える部分がある。
ダストストームか？
≪三重県熊野市 畑中明利≫
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Dr. P. Clay Sherrod (410mm SC : ToUcam PRO)
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There is an incredibly brilliant outbreak, perhaps yellow dust, between Margaritifer Sinus
and Sinus Meridiani this morning, this developing from a minor yellow cloud just 24 hours
ago. This feature is so bright that it is difficult to accurately image it without
greatly underexposing the rest of the Martian features surrounding it. Note the (at
least) seven (7) "fingers" or extensions that seem to radiate or spread outward from a
large central area of unprecedented intensity. This odd area was first noted early this
morning by Frank Melilo and Joel Warren and as it has rotated into view I believe that it
has actually rapidly intensified in brightness. Hopefully west coast (USA) observers will
get this as well....
I would appreciate the opinions and input of others, but honestly with the symmetry of the
radiations emanating from this bright spot, I am not sure that we cannot rule out a
catastrophic outflow, similar to that of eruption or even impact in nature. This does
appear, because of the concentration in brilliance and the rapidity of development, to be
extraordinary in nature.
Comparing the same face of Mars on Oct. 27 and 28, near CM 350 deg; note the incredibly
rapid development and intensification of the brilliant outbreak between Sinus Meridiani
and Margaritifer Sinus.
A very fine animation of my ASO images by Ron (mailto:1rondee@verizon.net) who has put
into motion the view of the new outbreak on Mars from this morning; as some have
suggested, I do believe that the feature is intensifying over time and that it did so in
the time frame of this sequence. Using a densitometer, there appears to be little if no
obliquity changes of other limb features either south or north of this as the feature
rotates into view, but the outbreak brightens substantially.
Animation of the Mars outbreak between October 27 (just beginning) to Oct 28 when in full
steam....absolutely incredible.
ASO images at near CM 350 deg., animation by 1rondee@verizon.net
Attached is an image compilation that you will find interesting; it is our (ASO)
image from Oct. 28 posed with that of Hubble ST taken at the same
time....remarkable. Thanks again to Ron for putting this together.
[Dr. P. Clay Sherrod Arkansas State U.S.A]
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Joel Warren(200mm SCT ToWcam Pro)
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A bit more re-processing to my original image.
If you look closely at the Blue channel you can see one, and likely a second, "extension" that Clay captured so well.
I would of given my right arm for another hour of cloud free skies. Linked and attached.
[Joel Warren TX U.S.A]
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Fattinnanzi Cristian ( 250mm Newtonian Philips Vesta Pro)
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[Fattinnanzi Cristian : Macerata ITALY]
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Brett Turner (254mm Newton ToUcam Pro)
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[Brett Turner, Perth Western Australia]
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Cristina Cellini(Meade LX200 12":ES640 Astromeccanica)
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2005/10/28 23.56(UT)
261mm Newtonian f. 4.8
Phillips Vesta Pro
Barlow 5x
[Cristina Cellini:Ravenna Italy]
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Hubble Space Telescope(2900mm fl=5300mm)
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South up image
Original 28.655kB jpg
NASA's Hubble Space Telescope snapped this picture of Mars on October 28, within a day of its closest approach to Earth on the night of October 29. Hubble astronomers were also excited to have captured a regional dust storm on Mars that has been growing and evolving over the past few weeks.
The dust storm, which is nearly in the middle of the planet in this Hubble view is about 930 miles (1500 km) long measured diagonally, which is about the size of the states of Texas, Oklahoma, and New Mexico combined. No wonder amateur astronomers with even modest-sized telescopes have been able to keep an eye on this storm. The smallest resolvable features in the image (small craters and wind streaks) are the size of a large city, about 12 miles (20 km) across. The occurrence of the dust storm is in close proximity to the NASA Mars Exploration Rover Opportunity's landing site in Sinus Meridiani. Dust in the atmosphere could block some of the sunlight needed to keep the rover operating at full power.
On October 29/30, Mars and Earth reached the point in their orbits where the two planets were the closest they have been since August of 2003. The red planet, named after the Roman god of war, won't be this close again to Earth until 2018. At the 2005 closest approach Mars was at a distance of 43 million miles (69 million km), comparatively a stone's throw across the solar system. Mars goes through a 26-month cycle where its distance from Earth changes. At times when the distance is smallest between the two planets, Mars appears brighter in the sky and larger through telescopes for Earth viewers.
This image of 2005 Mars closest approach was taken with Hubble's Advanced Camera for Surveys. Different filters show blue, green, and red (250, 502 and 658 nanometer wavelengths). North is at the top of the image. Mars is now in its warmest months, closest to the Sun in its orbit, resulting in a smaller than normal south polar ice cap which has largely sublimated with the approaching summer.
The large regional dust storm appears as the brighter, redder cloudy region in the middle of the planet's disk. This storm has been churning in the planet's equatorial regions for several weeks now, and it is likely responsible for the reddish, dusty haze and other dust clouds seen across this hemisphere of the planet in views from Hubble, ground based telescopes, and the NASA and ESA spacecraft studying Mars from orbit. Bluish water-ice clouds can also be seen along the limbs and in the north (winter) polar region at the top of the image.
For additional information, please contact Jim Bell, Cornell University, 402 Space Sciences Building, Ithaca, NY 14853, (phone) 607-255-5911, (e-mail) jfb8@cornell.edu, or
Mike Wolff, Space Science Institute, 4750 Walnut St., #205, Boulder, CO 80301, (phone) 262-790-1356, (e-mail) wolff@spacescience.org, or
Keith Noll, Hubble Heritage Team, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Md. 21218, (phone) 410-338-1828, (fax) 410-338-4579, (e-mail) noll@stsci.edu.
Japanese
NASAのハッブル宇宙望遠鏡は10月28日に火星を撮りました。10月29日の最接近の1日前です。最近、火星で数週間にわたって成長して、発達しているダストストームの地域のを得て興奮していました。
ダストストームは火星像の中央付近にあり、斜めにおよそ1500kmと測定されています。中口径の望遠鏡でこのダストストームを見えるのはそれほど驚きではありません。 画像で判別できる最も小さい物は直径約２０km、大都会のサイズです。 メリディアニのごく近くのローバー火星オポチュニティのいるところもダストストームがあります。 探査車を最大能力を働かせ続けるためには、大気の中のほこりが太陽光を妨げ、影響が出るもしれません。
10月29/30、火星は地球と最接近のポイントに達しました。 ローマ軍神にちなんで名付けられた赤い惑星は再び2018年までこの距離まで地球へ接近することはありません。 2005年の最接近には、6900万kmでした。 火星は26カ月の周期で地球と会合するところにあります。 この最接近の頃には火星は夜空で明るく見られ、地球から望遠鏡で見れば、より大きく見えます。
ハッブルのAdvanced Cameraと共にSurveysに2005年の火星最接近のこのイメージを取りました。 異なったフィルタは青、緑色、および赤(250、502と658ナノメートル波長)を見せます。 上が北極です。 火星が公転軌道上、近日点付近にあり、火星暦の上でも最も暑い季節、夏で、ほとんど消えかかった小さな南極冠が見えています。
大きななダストストームは、これより明るく、より赤い曇りの領域として惑星面の中央にあります。 この嵐は現在数週間惑星の赤道の領域で多発しています。また、火星の反対側にハッブルから見られたやや赤くて、ほこりだらけのもやと他の塵雲関係しています。画像を詳細に見ると、北半球高緯度(冬)の極領域で薄青い水氷雲が見えます。
[NASA/JPL/Space Science Institute]
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