Dear fellow astrophiles, you are right. I let my impatience betray me. I did not evaluate the other frames well. In the frame attached here (and also in the others) the solar disc is shifted but the spots remain on the same points of the frame.
I thank all of you for your attention and apologise for my carelessness.
The great Napoleon was right when he told his servants: dress me calmly because I am in a great hurry.
British Astronomical Association
Supporting amateur astronomers since 1890
