Bruce, In your description of use, I see you are apparently using the J, K, & L keys to advance time until the elevation of the Moon is what you want. That is the way I was using the program also. The only way I could see to step time was in increments of solar hours, days, or weeks, or sidereal days, weeks, months, or years. Since no finer time adjustments were available from key combinations. I assumed I had to start the process at some date and time plugged into the Date/Time window and let it free run, but under control of the J, K, & L keys, from that starting time. I didn't occur to me that with time advance stopped with the K key, the Date/Time window provided the step time feature down to increments of 1 second, which I needed to determine a precise angular elevation above the horizon from my observing point. When you let time free run until the Moon is at the elevation you desire above the Wasatch Mountains, how do you know that elevation angle if you don't know the azimuth of the Moon when it rises above the undulating ridge line of the mountains? Hmmm. To answer my own question, you must be so far away from the mountains that those variations don't matter. Right? Thank you for pointing out that other possible way to increment time with Stellarium, it is just the key I needed. Ed ------------------------------------ Quoting Bruce Hugo via Utah-Astronomy <utah-astronomy@mailman.xmission.com>:
Hmmm... I've not used Stellarium in the way you wish use it to achieve moon positioning. I'm at work right now and not able to run Stellarium, but from memory, is there a "jump to time" option where you input the time and date you wish to display in Stellarium? Could use that to jump forward (and backward) in time in small increments once you have the approximate time/location with the j, k and l keys? Guess I didn't realize the level of precision you were looking for. To get an approximate time the moon is coming over the Wasatch for photography, I run it quickly forward on the date I desire. As I approach the moon level I'm looking for, I begin slowing it up and finally stop it at the elevation I desire and look at the time. Thats the time I need to be ready for photography. I only need rough estimates for my use. Bruce Equipped with his five senses, man explores the universe around him and calls the adventure Science. - Edwin Powell Hubble