Jupiter with GRS (Mike Dobres)

Contains: Solar system body or event

Jupiter with GRS

Acquisition type: Lucky imaging

As a newbie to planetary imaging, I decided to try and screen for the best seeing window during a 2 hour session. This is a stack from the 8 best of 56 x 1 min SER videos (ca. 2400 frames each). Quality was screened by batch processing all 52 videos through AS and RS. It's amazing how much seeing varied during the 2 hour session. The best, not surprisingly, was when Jupiter was at it highest (36 deg)

26% of each video was processed in Autostackert and Registax (gentle sharpening with first 3 wavelets). The best 8 were then derotated in WINJUPOS, and then resharpened, denoised and color aligned in Registax.

Early in the session, I compared a low gain of 120 and exposure of 25 ms (29 FP). Compared to 250 gain at 10ms (100 FPS) , the lower gain avoided blowing-out the 'white bands' below the equator. Didn't see any difference in sharpness between 10 and 25 ms. I could not get any increased sharpness using Photoshop of the final Registax image.

Before the session, I did check the collimation with an out of focus star (Izar) at the same elevation ca (35 deg), and it looked pretty perfect: a nice series of concentric rings around a dark center.

Seeing was good but far from perfect, meteoblue showed 4 on index 1, and 3 on index 2. With a jet stream 22 m/s. There were a few very thin clouds occasionally on and around Jupiter, which didn't help. So definitely room for improvement. Any feedback or ideas welcome!

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Description: This revision has less wavelet sharpening in RS after WINJUPOS. I also increased contrast to 110% in RS. Looks less distorted.

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