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Venus Image 2024/12/20(UT)
眞島清人
Clyde Foster,Tiziano Olivetti,Fumega Camilo Ucha,Niall MacNeill
K.Mashima,C.Foster,T.Olivetti,Camilo,N.MacNeill
日没約１時間前に確保。当初シーイングは不良でしたが日没に向けて落着いてきました。
[眞島清人 : Kiyoto Mashima,Naha,Okinawa,Japan]
Image set from well into yesterday evening due to earlier cloud. Conditions were poor,with Venus down towards 20 deg altitude,and I only managed 4 usable UV captures.
Greg,I saw your post,but unfortunately I don’t see any obvious indication of CD in my IR image.
[Clyde Foster : Khomas,Namibia]
Below average seeing and transparency.
［ティジャノ:オリベッティ バンコック タイ］
[Tiziano Olivetti : Bangkok Thailand]
My first image of Venus before Murphy clouded the sky.
[Fumega Camilo Ucha : Galicia,Spain]
I had nice conditions for Venus a couple of evenings back. I did a couple of imaging runs on UV about 32 mins apart. The second tranche was the better of the two, but the quality was pretty good for both. The animation I made between these two images nicely shows the cloud movement over the half hour, with clouds moving from right to left.
Greg Shanos asked if anyone had observed a vertical cloud discontinuity in IR on the same day, remembering that we were imaging many hours apart (me at 09:35 to 09:45 UT vs Greg's at 22:33 UT). Nevertheless I fancy that in both my IR 642nm BP and IR 850nm BP images there is some evidence of a discontinuity near the limb. Given the diffraction issues near the limb I can't be certain they aren't artefacts, however, both images show very similar structures overall.
The UV image has nice resolution I think and again there is evidence of a vertical discontinuity near the limb.
I also made an IR(G)UV image with the IR 642nm BP image and the UV image from the second run. Once again the resolution of detail here was pretty good and supportive of the discontinuity being real. However, I would leave the determination of that to those with more expertise.
[Niall MacNeill : Wattle Flat,NSW,Australia]
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