Saturn Section: September 4, 1999

1999年 9月 4日の土星

池村俊彦、薄出敏彦、新川勝仁、前田和儀
T.Ikemura, T.Usude, M.Niikawa, K.Maeda

Masahito Niikawa (280mm Schmidt-Cassegrain, Digital Still Camera Minolta Dimage EX1500)
Condition:
1999/09/04 15h29m00s(UT) I=181.1 III= 16.8, 8 frames compsoite
1999/09/04 15h38m08s(UT) I=186.5 III= 22.0, 8 frames compsoite
1999/09/04 18h00m20s(UT) I=269.8 III=102.0, 6 frames compsoite
1999/09/04 18h27m17s(UT) I=285.6 III=117.2, 25 frames compsoite
1999/09/04 19h58m36s(UT) I=339.2 III=168.6, 10 frames compsoite
Seeing = 7/10 Trans.= 3/6
All images are taken with ;
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 : 1/3 sec
Analog gain: 6dB
Image Processing;
The Maximum Entropy Method deconvolution after composite of the original taking images. And enhanced with the unsharp masking method.
Condition:
1999/09/04
16h58m40s(UT), I=233.7 III= 67.3, 15 frames composite
17h07m17s(UT), I=238.7 III= 72.2, 14 frames composite
Seeing = 8/10 Trans.= 1/6
All images are taken with ;
Telescope : C11 (SC) D=280mm fl=2800mm
Camera :Minolta DimageEx1500 Digital Camera taking lens removed
Effective F No.: 11 (SC Sub-Mirror Projection)
Filter: IR 84 filter (Approx imaging band 840nm-960nm)
Obs.site : Mozuhonmachi Sakai-City Osaka Japan
Exposure : 1/2 sec
Analog gain: 6dB
Image Processing;
The Maximum Entropy Method deconvolution after composite of the original taking images.
Toshihiko Ikemura (310mm Newton, Digital still camera NEC Picona)
Condition:
1999/09/04(UT)
No.1 17:18:42(UT) I=245.4 III= 78.6, 3 frames composite
No.2 17:30:26(UT) I=252.3 III= 85.2, 4 frames composite
No.3 17:31:00(UT) I=252.6 III= 85.5, 3 frames composite
No.4 17:33:04(UT) I=253.8 III= 86.7, 5 frames composite


De=-23.1  E.Dia=18.92"
Ring Long  dia 43.13"  Ring short dia 16.91"  
310mm Newtonian(F5)
TeleVue barlow 5x  f/35, 2 deg. prism,
Digital camera NEC PICONA 1/7sec
Comment
composited of the frame which was filmed within 1 minute was done, and each picture was made.
Change of the white dapple is not found.

Comment(Japanese)
それぞれの画像は１分以内に撮影した複数のコマからコンポジットしたものである。
白斑等の変化はみられなかった。
Kazuyoshi Maeda (350mm Newton, Digital still camera NEC PICONA)

1999/09/04 18:21:22(UT)
I=282.3 III=113.9
350mm Newton(F5)
NEC PICONA 1/7sec, 3 frames composite
Toshihiko Usude (250mm Newton, Cooled CCD Camera SBIG ST-7)

1999/09/04 19h03m(UT)
I=306.6 III=137.3
250mm Newton(F7), Or12.5mm
SBIG ST-7, R(600nm) filter, 3 frames composite
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