I think your questions are very good. You might want to find out whether or not your astrolabe was unique or just an average astrolabe. If it was unique you might want to find out who owned it or who made it. Question 2 is probably going to have a very short answer; it will be just a list of a few professions that might require the use of your object. The same with Question 4 although you could think about the geographic location might affect how you would use it.
I think your questions are very good. You might want to find out whether or not your astrolabe was unique or just an average astrolabe. If it was unique you might want to find out who owned it or who made it. Question 2 is probably going to have a very short answer; it will be just a list of a few professions that might require the use of your object. The same with Question 4 although you could think about the geographic location might affect how you would use it.