Venus IR(G)UV (Niall MacNeill)

Contains: Solar system body or event

Image of the day 01/04/2025

Venus IR(G)UV

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. See the animation as Revision B. I estimate that the cloud fronts travelled 170kms in those 32 mins, so the average speed was ~ 320 km/hr.
I fancy that in both my IR 642nm BP (Revision C) and IR 850nm BP (Revision D) images there is some evidence of a vertical 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 (Revision E) shows nice resolution I think and again there is evidence of a vertical discontinuity near the limb.
I encapsulaed all the information in this single 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.

Original
B
C
D
E

B

Description: Animation showing cloud movement over 32 mins

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C

Description: IR 642nm BP image

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D

Description: IR 850nm BP image

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E

Description: UV image (colourised violet for aesthetic effect)

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Image of the day 01/04/2025

Venus IR(G)UV

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