1999年 3月 3日の火星

新川勝仁(Masahito Niikawa)

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


1999/03/03
Ls = 104.8, De = 15.6, Dia = 10.6"
Seeing: 3-5/10 Transp.=2/10

17h17m48s(UT), CM = 140.1, 20 Flames composite
18h55m00s(UT), CM = 163.8, 13 Flames composite
20h18m20s(UT), CM = 184.1, 12 Flames composite

17h18m(UT) CM=140
18h55m(UT) CM=164
20h18m(UT) CM=184
Xephem 3.0によるシミュレーション
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 after composite of the original taking images (the leftmost images)
  • Enhanced the leftmost images with the unsharp masking method (2nd left). The color of these images are simulation of naked eye.
  • Enhancing the Blue channel layer images with contrast adjustment. of the leftmost images for easy detection of atmospheric phenomena (3rd left)
  • Hue of the 3rd left images is inverted (the rightmost images )
Remarks:
  • The seeing was fairy good.
  • The cloud is seen along the equator.
  • THARSIS , NIX OLYMPICA and ELYSIUM is bright.
  • Especially THARSIS cloud is so bright that easily recognized with the naked eye.
  • The B channel enhanced images show that the color of cloud is relatively blue from TARSIS to NIX OLYMPICA and in other equator area its color seems to be white whose color is indicated as CYAN color on the blue channel enhanced image.

今日の火星（安達　誠）

実に見事に低緯度地方のベルト状の雲が捉えられています。大きく３つある明るく白い部分はいずれも雲に当たります。特に中央に位置する白い斑点状の部分はNix Olympia（オリンピア山）に相当します。火星の北半球の季節は春から夏にかけての季節に相当しますが，このあたりの季節では北半球の低緯度地方に雲が出ることが普通で，今回の観測はその予報を確認できたといえます。
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