Realtime satellite position projector

I want to try a cool project that will use a laser pen and a couple of servos to project the position of a satellite I choose in realtime on the wall/ceiling in my lounge. But I need a realtime feed of the coordinates of the satellite to give to the servo so that I can display the laser spot in the correct position in the lounge. Does anyone know where I can get a simple coordinate feed from the internet to read from my arduino? Really need your help! Thanks

You probably have enough computer power to calculate the position from the orbital elements:

CelesTrak can provide the orbital elements: CelesTrak: Current Space Track NORAD Two-Line Element Sets

Back in the day I (and I think also some NASA stations) used the below program for satellite tracking. If your pc has accurate timing, the program is amazingly accurate. I compared live video feeds from space station to the program prediction for when the station would move from light to dark. Accurate to maybe within one or two seconds.

http://celestrak.com/software/dransom/stsplus.html

That's really helpful. Thanks. Will look at the links and give it a go! Will post some of our design thoughts and implementation as we go along.

If you run Linux, there is Predict.
in server mode it outputs altitude and azimuth for a given satellite on port 1280.
Predict does other cool stuff as well.

As far as I know, stsplus doesn't output tracking info, my copy doesn't.