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Saturn Image 2023/07/07(UT)
阿久津富夫
Clyde Foster,Gary Walker,John Sussenbach,Serge Dramonis
C.Foster,G.Walker,J.Sussenbach,T.Akutsu,S.Dramonis
I had a shorter session this morning as I had a few commitments to deal with during the day.
Conditions were pretty decent.
In the R and IR,there may be some light spots in the far south,but these may well be artefacts. Something for observers /imagers to keep an eye out for,to confirm one way or another.
[Clyde Foster : Khomas,Namibia]
Fair seeing but poor transparency this morning. Storms are not evident.
[Gary Walker:Georgia:USA]
[スセンバッハ:オランダ]
[John Sussenbach:Houten,Netherlands]
夜半前は良く晴れた空。IRフィルターで撮ってみました。IR領域に感度があるからカラ−CMOSカメラの威力を発揮し、今まで撮れなかったIR‐1000画像が簡単に得られました。
≪Cebu PHILLIPINES 阿久津富夫≫
Seeing 9/10 Trans 9/10
Interesting results were obtained when shooting Saturn. The Johnson/Cousins Ιc filter was used.
The picture views a dark area. When checking the position of the satellites, it was noted that this area almost exactly coincides with the position of the satellite/shadow from inner Saturn's satellite Aegaeon.
The satellite itself is difficult to detect due to its small size and low albedo.
However, it is difficult to rule out that the shadow projection from the satellite is detected as slightly darker pixels, for example, from one to several.
When summing frames, it is also difficult to assert that the alignment is carried out exactly according to the this pixels. Therefore, when stacking frames, darker pixels are strengthened and may expand somewhat given the long exposure time (21 minutes), the number of frames (more than 40,000).
This allows us not to exclude and assume that this transit of Aegaeon.
Aegaeon is an inner moon of Saturn and is believed to be the main source of the G ring.
[Serge Dramonis : Athens,Greece]
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