ALPO-Japan: Jupiter Section (December 30 1999)

1999年12月30日の木星

池村俊彦、新川勝仁
T.Ikemura, M.Niikawa

December 30, 1999(UT)

Summary
Toshihiko Ikemura (310mm Newton, Digital still camera NEC Picona)

No.204 1999/12/30 09:19:28(UT)
I=143.9 II=136.4 III= 17.5
De=+3.1 Dia=42.91"
310mm Newton(F5)
TeleVue barlow 5x (f/30)
NEC PICONA 1/7sec
5 frames composite

No.205 1999/12/30 09:29:20(UT)
I=150.0 II=142.4 III= 23.5
De=+3.1 Dia=42.91"
310mm Newton(F5)
TeleVue barlow 5x (f/30)
NEC PICONA 1/7sec
5 frames composite
Comment:
I received information between "The Jovian equator zone becomes dark." from David L. of J_Net. I watched Jupiter on December 30 carefully.(09:30UT) When I saw it with my eye, change specially seemed to as for Jupiter, be no. But, Jupiter which I got images with the digital camera suggests a situation whereby an equator zone is a little dark. I suppose that the equatorial line becomes especially thick.

Sorry ,this images focus striking defects.

Comment(Japanese):
J_Net の David L. から 木星の赤道帯が暗くなっている との情報を受けました。12月30日は注意深く眼視で見たのですが、特に変化は感じられませんでした。しかし、デジカメで撮影した木星は、赤道帯が暗くなっているように見えます。特に赤道の線が濃くなっているように思います。

すみません、ピント不良

Masahito Niikawa (280mm SC, Digital still camera Minolta DimageEx1500)
1999/12/30 13h26m00s(UT) I=294.2 II=285.4 III=166.5 7 frames composite
1999/12/30 13h33m40s(UT) I=298.9 II=290.1 III=171.2 6 frames composite


Telescope : C11 (SC) D=280mm fl=2800mm
Camera :Minolta DimageEx1500 Digital Camera taking lens removed
Effective F No.: 25 (XP24mm Eyepiece Projection)
Filter: IR cut & Low-pass built-in the camera
Obs.site : Mozuhonmachi Sakai-City Osaka Japan
Exposure : 1/8 sec, Analog gain:8-6dB
Seeing:4/10 Transp.:3/6
Image Processing
The Maximum Entropy Method deconvolution after composite of the original taking images. And enhanced with the unsharp masking method.
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