土星 ALPO-Japan Latest
Saturn Image 2011/05/24(UT)
George Tarsoudis,David Arditti,Paul G. Abel,Dennis Put,Damian Peach,Marc Delcroix
Seiichi Yoneyama(248mm Newton)|
Kozawa Tokujiro(315mm Newtonian)|
(Kozawa Tokujiro : Hachiouji-City Tokyo Japan)
George Tarsoudis ( 254mm Newtonian )|
Telescope 10 inch @f/6.3,DMK 21AF04,Barlow 3X,filters R-G-B
[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》
With Saturn making a lovely pairing with Porrima,Gamma Virginis,in the evening
sky now,only half a degree apart (and closing),I though I would take them both
together with my widefield setup (ZS66 and EOS 400D).
I then took them separately with the normal C-14 high-res setup,at the same
scale and orientation. I used an IR filter on Porrima.
[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]
The seeing was reasonable for a time,although it did drop off as Saturn's altitude decreased. Still it was a most interesting evening,and I observed a number of interesting things:
Paul G. Abel(203mm reflector)|
Drawing 1: SPR a noticeable bluish tint seemed to be present along with two reasonably defined belts. ShRG rather large now. EZ quite bright,and a EB was present. NEB a double feature although NEB(n) was darker and better defined. I was under the impression that NEB(s) contained three distinct dark sections. The northern edge of NEB(n) was most interesting and I thought Damian Peach's recent image confirmed my visual impressions well: the edge is no longer smoth and continuous,rather it has a fractured ill defined look to it,and does not pass uniformly into the bright NTropZ. NTB present but ill defined towards the planet's centre,almost as if it is being broken up in some way- it is hard to describe. NTZ quite bright and a greenish tint present here. Greenish-blue hues present in NPR.
Rings quite interesting- A-Ring light brownish colour,B1-Ring bright,B2 Ring a yellowish gray,and the C-Ring best seen in the ansae centre. Cassini Division also reasonably well seen. However,most interestingly,there appeared to be a greenish tint present on the following ansae and not on the proc. one. Whether this was real,or an atmospheric (ours) issue I am not at all certain,although i would not be at all surprised to learn that it was a seeing artifact! The effect (whatever its,cause) had gone by the time of the second drawing,and filter work carried out later showed no difference in brightness in a W80A,W25A or W11.
Drawing 2: The storm has now come onto the disk,but due to Saturn's low altitude,not a lot of fine detail was seen. I feel it still retains it's comet like appearance and is a bright white at the centre (it really stands out in W80A).
Titan: As David Gray suggested the star SS-Vir as a comparison star for Titan,I looked it up (and found it quite quickly). I was stunned at just how red it was (rather coppery red),what a truly beautiful object! Titan still looked distinctly orange (though not quite as red as bnefore),however it was clearly more orange than 34 Bootis but not as red as SS Vir.
[Paul G. Abel:Leicester:United Kingdom]
[A.Yamazaki: Machida Tokyo Japan]
Seiichi Kanno(300mm Newtonian)|
[Dennis Put:Brielle City Netherlands]
林敏夫 Toshio Hayashi (355mm Schumidt-Cassegrain)|
Under fair conditions.
Damian Peach (350mm Celestron SCT)|
[Damian Peach: Loudwater,Buckinghamshire,United Kingdom]
2 bright spots and a white streak are visible in the Northern trail, the dark spot is setting in these images. The NtrZ is bright in violet image.
A montage with Saturn in RGB and satellites in R+IR from 2 different movies, brightness enhanced. From left to right Dione,
Tethys, a star above the rings plane, weak Mimas,
Saturn, Enceladus and Rhea
[Marc Delcroix Tournefeuille,France]