1999年 3月 1日の火星

新川勝仁(Masahito Niikawa)

Masahito Niikawa (280mm SC, Digital still camera Minolta DimageEx1500)


1999/03/01
Ls = 104.0, De = 15.7, Dia = 10.4"
Seeing: 2/10 Transp.=2/10

16h43m44s, CM=150.3, Single image
17h27m22s, CM=161.0, Single image

Telescope : C11 (SC) D=280mm fl=2800mm
Camera : Minolta DimageEx1500 Digital Camera
         taking lens removed
Effective F No.: 100 (Or7mm Eyepiece Projection)
Filter: IR cut & Lowpass built-in the camera
Obs.site : Mozuhonmachi Sakai-City Osaka Japan
Exposure : 1/4 sec

Image Processing:

  • the Maximum Entropy Method deconvolution of the original taking image(the leftmost images)
  • Enhanced with the unsharp masking method (2nd left)
  • Enhancing the Blue channel layer images with low pass filtering and contrast enhancement of the leftmost images for easy detection of atmospheric phenomena of the Mars.
  • Hue of the Blue channel enhanced images is inverted (the rightmost images )
Remarks:
  • I could get only 2 good images because of the bad condition though I took hundred of images. So I gave up to compose multi frame images.

16h44m(UT) CM=150
Xephem 3.0によるシミュレーション

今日の火星（安達　誠）

この画像で見る限り，Tharsis（タルシス）からArcadia（アルカディア）にかけて夕霧が出ています。とりわけTharsis付近の雲はよくわかります。注意深く見ると，北半球の低緯度地方を中心に雲が帯状に出ている様子が読み取れます。全体的に低緯度では雲が小さいように思われました。
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