Jupiter

On 14 November 2011, I mounted my 8” Dobson onto the CGEM mount using the Hofheim ‘dovetail’. With the DMK camera in the prime focus, without a filter, I obtained two videos on Jupiter, which were processed (aligned & stacked, 350 frames each) using Registax 4.0. The first image shows the cloud structure onJupiter, with two moons: Io (left) and Ganymede (right). The exposure time per frame was around 1/3000 or less (I forgot to write it down, it was actually a test run to see how well the Dobson would fit on the CGEM - apparently it does). The second picture below was taken with longer exposure per frame (1/30 s ?) which results in an overexposed image for the planet, but it shows clearly the four“Galilean moons”: Kallisto, Io, Ganymed and Europa (from left to right).

Europa

Ganymed

Io

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Kallisto