In this case, in manual mode, f5.6, 1/80th sec, and ISO 6400. Any slower then you just get a blob, and faster more detail but very faint. Trial and error as usual, The planet is a bit low in the sky here, so quite a lot of atmosphere to get through...
Yes, the shutter speed, etc needs to be fairly quick to avoid the blob. I used 1/80 sec, but I could have gone a bit faster there. So I was slightly overexposed, which has all the detail in the original shot. PP'ing to bring out the details from this....
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