http://a188-l009.rit.edu/richmond/
「月面のアポロの着陸船を見ることができるのか？」 このような質問がしばしば聞かれる。地球上からの光学的な望遠鏡でアポロの着陸船を確認することは確かに不可能である、近赤外線の改造された光学機器使用の最高の設備のシステムでも分解能はおそらく０．０２arcsec.である。月着陸船の幅は５ｍで、３８２、０００ｋｍ離れているので、０．０００３arcsecを要する。月に接近した（近紫外線、near-UVの）ハッブル宇宙望遠鏡でさえ、その最高の分解能が０．０３arcsecで充分ではない。
This question comes up frequently. It's clearly impossible for an optical
telescope on the Earth to resolve any of the Apollo hardware on the Moon,
since the best systems, using adaptive 改造されたoptics in the near-infrared赤外線,
can resolve details of maybe 0.02 arcsec. A lunar lander of width 5 meters,
at a distance of 382,000 km, subtends an angle of 0.003 arcsec. The Hubble
Space Telescope isn't appreciably評価しうる closer the Moon, and its best
resolution is about 0.03 arcsec in the near-UV. Not good enough.
Update Aug 17, 2002
An infrared image taken by one of the the European Very Large Telescopes in
Chile, which has 8.2-meter mirror, shows some of the finest detail observed from
the Earth. At the ESO
Press Release page, you can see images with an angular resolution of about
0.07 arcsec; they show details as small as 130 meters across. Still a lot larger
than the lunar lander....
Is it possible that a lunar lander might cast a shadow long enough to be
detected from the Earth? Well, possibly -- but I doubt it very much.
我々はアポロのＣＳＭ(Command Service Module) 司令船と機械船が、月の周回軌道にある時に写した、月の着陸船が影を投げかける写真を見ることが出来る。
|
注意：
CSM (Command Service Module) は、CM (Command Module/司令船) と SM (Service
Module/機械船) が連結されたモジュールである。 通常、アポロ宇宙船といえば
CSM 又は CSM ＋ LM （Lunar Module /月着陸船） を指すことが多い。
|
あなたは自分でほとんど目立たないその影を確認することが出来る。地上から望遠鏡でその影を見るためには、アポロＣＳＭ宇宙船の写真で見ることが出来るものと同じくらい小さいものの詳細を示せる写真を写す必要がある。そのような地球から撮られたいかなる写真も知らない。
We do have pictures of the shadows cast by lunar landers, taken by the
Apollo command and service module (CSM) as it orbited the Moon. You can see for
yourself that the shadows are very inconspicuous目立たない. In order for a ground-based telescope to see
the shadows, it would have to be able to take pictures showing details
as small as those visible in the CSM pictures. I don't know of any such
Earth-based pictures.
ハワイ大学のアレックス･Ｒ･ブラックウエル（Alex R. Blackwell）はアポロ飛行士が撮った３枚の写真を２００１年１月３日にＳＣＩ．ＡＳＴＲＯ．に提出した。
Alex R. Blackwell, of the University of Hawaii, provided pointers to three
photographs taken by Apollo astronauts, in a posting to sci.astro on Jan
3, 2001. He wrote:
The only relevant関連の imagery I could find on a NASA website of the Apollo
landing sites and hardware are the following: Apollo 15 site: High resolution
vertical view
ＮＡＳＡアポロ１５号の写真：AS15-9377[P])
ＮＡＳＡのキャプション：月面のはっきりとした影を投げかける着陸船
NASA photograph AS15-9377[P])"
The caption reads "The Lunar Module casts a distinct shadow on the
mare surface. (
http://www.lpi.usra.edu/images/sapo/sapo_S24.gif
拡大図
ＮＡＳＡアポロ１６号の写真：AS16-4558[P]
ＮＡＳＡのキャプション：ケイレイ平原ではっきりとした影を投げかける月着陸船。着陸地点はスポーククレーターのリムの東約５００ｍのところで、最初の選外活動で飛行士たちが探査している。
NASA photograph AS16-4558[P])"
Apollo 16 site: High resolution vertical view
The caption reads "The Lunar Module casts a distinct shadow on the
Cayley Plains. The landing site is about 500 meters east of the rim of
Spook Crater, which was visited by the crew during the first EVA.
http://www.lpi.usra.edu/images/sapo/sapo_S30.gif
アポロ１７号の写真：NASA photograph AS17-2309[P]
ＮＡＳＡのキャプション：タウラス−リトロウ峡谷、数１００ｍサイズのクレーターの中．
Apollo 17 site: Enlargement of high resolution view
The caption reads "The Lunar Module landed on the Taurus-Littrow valley floor among several 100-meter-sized craters. The first EVA included setting up the ALSEP station and an investigation of Steno Crater (the largest crater on the lower margin). The second EVA included traverses along the southern rim of Camelot Crater (large crater left of the landing site).
http://www.lpi.usra.edu/images/sapo/sapo_S36.gif
I would presume that these images are from the respective CSM SIM bay
panoramic cameras.
Last modified Dec 5, 2002, by Michael Richmond.
高空間分解能: 0.08 arcsec/pixel. SOFI: 近赤外撮像分光装置; λ = 0.9 - 2.5 μm;