ALPO-Japan: Jupiter Section (March 20, 2000)

2000年 3月20日の木星

池村俊彦、新川勝仁
T.Ikemura, M.Niikawa

March 20, 2000(UT)

Summary
Last Image of STB Ovals BE/FA （合体直前のBE/FA）

3月20日に合体(マージ)直前のSTB白斑BE/FAがとらえられました。池村氏の画像では、BEはII=21度、FAはII=28度で、その中心の経度差は7度です。15日の8.5度からさらに接近しています。また、BEはやや北寄りに位置し、FAとの緯度の差が顕著です。新川氏もほぼ同時刻の画像ですが、BE/FAが分離できていないようです。


T.Ikemura

STB Ovals BE and FA is 7 degree apart on March 20, 2000. Ovals BE and FA are located at 21 and 28 degree(system-II) from the images obtained by Toshihiko Ikemura(measured by Y.Iga).

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

2000/03/20 09:16:22(UT)
I = 314.6, II = 49.2, III = 311.8
3 frames composite
2000/03/20 09:26:39(UT)
I = 320.9, II = 55.4, III = 318.0
4 frames composite

2000/03/20 09:32:15(UT)
I = 324.3, II = 58.8, III = 321.4
4 frames composite
Telescope : C11 (SC) D=280mm fl=2800mm
Camera :Minolta DimageEx1500 Digital Camera taking lens removed
	CCD:ICX205AL

Effective F No.: 25 (XP24mm Eyepiece Projection)
Filter: R60
	Imaging band (600-1000nm)

Obs.site : Mozuhonmachi Sakai-City Osaka Japan
Exposure : 1/30 sec,Analog gain:6dB
Seeing:1/10 Transp.:2/6
Image Processing
The Maximum Entropy Method deconvolution after composite of the original taking images. And enhanced with the unsharp masking method.
Toshihiko Ikemura (310mm Newton, Digital still camera NEC Picona)

No.xxx 2000/03/20 09:21:22(UT)
I=317.7 II= 52.2 III=314.8
De=+3.0 Dia=34.29"
(Enhanced by Y.Iga)

310mm Newton(F5)
TeleVue barlow 5x (f/27)
2 deg. prism
NEC PICONA 1/7sec
5 frames composite


No.xxx 2000/03/20 09:24:32(UT)
I=318.4 II= 52.9 III=315.5
De=+3.0 Dia=34.29"
(Enhanced by Y.Iga)

310mm Newton(F5)
TeleVue barlow 5x (f/27)
2 deg. prism
NEC PICONA 1/7sec
4 frames composite


No.xxx 2000/03/20 09:28:52(UT)
I=322.3 II= 56.7 III=319.4
De=+3.0 Dia=34.29"
(Enhanced by Y.Iga)

310mm Newton(F5)
TeleVue barlow 5x (f/27)
2 deg. prism
NEC PICONA 1/7sec
4 frames composite

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