土星 ALPO-Japan Latest
Saturn Image 2008/02/25(UT)
福井英人,冨田安明,阿久津富夫
David Arditti,Carl Roussell,George Tarsoudis
D.Arditti,H.Fukui,Y.Tomita,C.Roussell,T.Akutsu,G.Tarsoudis
The night of February 24/25 having been cloudy,this was the closest
I could get to imaging Saturn at opposition. Seeing was poor.
I therefore reduced the amplification on the C-14 from the usual x3
Barlow to a x1.6,and took images across the spectrum from 320-804nm.
The over-brightness of the rings compared to the globe is seen to be
greater in the IR than the R,and greater in the UV than the B. This
is unexpected to me,as I expected just a trend towards greater ring
brightness from longer to shorter wavelengths,based on my imagery in
the visible at past oppositions.
The exposures were:
IR 133ms x 240s
R,G,B 33ms x 60s
UV 4000ms x 240s
with about 33% of all frames taken stacked.
[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]
[Hideto.Fukui (Shizuoka-Prefecture Japan)]
≪静岡県藤枝市 福井英人≫
|
Yasuaki Tomita (255mmREF) |
風が強くシーングが最悪ですかろうじて
カッシニが見えます。
≪群馬県佐波郡 冨田安明≫
|
Carl Roussell(150mm F8 refractor) |
Date: 2008/02/25 1:59 UT
Optics: 15cm f/8 Refractor
Magnification: 200x - 300x
Filters: IL,W23A,W58,W38A
Seeing: 4/10 Trans: 4/6,windy
B=-8.4 deg B'=-10.3
CM1=308deg CM2=164 deg CM3=108deg
[ Carl Roussell : Cambray Canada]
|
Tomio Akutsu (355mmSC C14) |
土星は衝となり、リングが明るくなっています。
土星本体に白斑があるようですが、一連のもの
ではなく、明るいものではありません。
≪Cebu PHILLIPINES 阿久津富夫≫
|
George Tarsoudis ( 250mm Newtonian ) |
08/02/25 22:11:07 - 22:23:39 UT & 22:26:02 - 22:32:29 UT
250mm at f/6.3 Newtonian, DMK 21AF04 at f/38, L-RGB
Seeing 6/10 Trans 7/10
[George Tarsoudis,Alexandroupolis of Greece]
《ターソウディス ギリシャ アレクサンドロポリス》
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