Hello Thomas

> How can I have Guide to lock onto a solar system object, making it stay at screen
> center when changing the date/time?

right click on the object, click on ok, click on animation | animation. In the
small pop up window set the radio button "moving object" (bewegtes Objekt in
german). When you now change the time by using the arrows of the animation popup
window the moving object (planet, comet, minor planet etc.) will be centered on
the screen.

Clear skies (and stop the rain)
Bernd

Bernd Brinkmann

Sternwarte Herne, MPC code A18
Herne, Germany

e-mail: info@...
http://www.sternwarte-herne.de