False color Venus (bunyon)

Contains: Solar system body or event

False color Venus

Acquisition type: Lucky imaging

Imaging scope was a 15" Newt with a 2x Barlow, giving approximately 4400mm EFL. Pretty low but about all I could do with the UVenus filter. The UV image is a derotation of 3 movies shot with a UVenus and ASI174. The IR and G are single channels. Videos were 2 minutes long at approximately 240 fps for G, 180 fps for UV and 200 fps for IR and the best 33% of frames were stacked in AS2 and sharpened in Registax 6 before being measured, derotated and assembled in Win Jupos. The G channel is a simple Astronomik G filter (so a true G image). The IR filter is a surplus 800nm longpass filter.

The individual channels are shown at capture scale. The two RGBs are shown at 175% capture scale. The one on the left has been processed rather gently while the one on the right, the same image, has been processed with great exaggeration of hue and saturation in an effort to bring some of the markings out. I'm not terribly happy with how either looks. I would like the markings evident in the UV image (and even some subtle shadings in the IR - not sure if it will come through in the jpg online) to show up in the false color image without looking so garish.

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