Unfortunately the red spot was not visible.Ī series of images was used to make a little animation showing the rotation of Jupiter in less than 20min. 05:35UT Using the 130mm refractor with 3x Barlow gave some surprisingly nice results and detail.

It helps to have large numbers of frames. Still the large aperture seems to be very sensitive to seeing issues. 20:42PST The CDK12 was used on a night with better seeing. Still the quality of the image is not as good as one would expect from the aperture. The sequence of images was combined into an animation video. Using different USB ports for the ASI camera and the mount interfacing USB to serial adapter works well.

Performing testing on guiding with Firecapture 2.4 went well. 04:36UT Another evening of average seeing going back to the 130mm refractor. There was enough time to record 34 images which were put into an animated Video. The seeing was worse than usual and again the 130mm refractor was the only choice to reduce susceptibility to the turbulence. 04:18UT Finally a transit of the Great Red Spot. Just before the end of the shadow transit Jupiter disappeared behind the roof of the house. Seeing was not good and I chose the 130mm refractor for imaging.Ġ3:08UT The red Spot disappears at left and Io is right of the center.Ġ3:37UT Io is left of center and its shadow right of center.Īltogether I took 56 AVIs and made a time lapse movie of the transit of Io. There still was a second nice imaging opportunity with the transit of the moon Io and its shadow. Only later in the images I saw that the spot was just disappearing behind the limb of the planet. During the initial observation I did not see it. 03:08 to 05:06UT At first I thought that Calsky had made an error as it had predicted the visibility of the Red Spot. The example dark shown below is level-stretched to show the FPN structure. I also tried out darks but they don't give an additional improvement so the extra effort can be saved. They can be calibrated out by using flats with the processing in AS!2. They are caused by ASI120MC high speed mode picking up FPN (Fixed Pattern Noise) from the sensor chip. (Update for ) I did an analysis about the color spot artifacts on Jupiter. Processing in AstroStakkert!2, Registax 6 and Photoshop CS2. Images taken with 5inch APO refractor or 12inch CDK

Saving registax 6 wavelets