Hi,
Happy to hear that maybe you can find it useful.
Now I'm in the learning process how to do the calculation direct on the web page.
I have started with the first one, which is not in the excel sheet.
In this calculation you find how many pixels a star moves when you have the camera on a tripod (without a motor). It not just calculate for the eclipta, it do it for the DEC angle where the center of sensor is pointing, and the bottom an top of the sensor along the DEC axis. The last two could be important when having wide angle lenses.
Take a look:
http://astrofriend.eu/astronomy/astr...-exposure.html
This is very new for me, what I have understand you must have a HMTL5 compatible web browser.
I will develop it further.
Merry Christmas and a Happy New Year to all of you!
ps.
A curious question from a man living in the northern hemisphere. How do you orient your camera, the top of image to the south pole, which would be most natural, or to the north as the maps are usually orientated in the books?
/Lars