Here is a YouTube video from ESA demonstrating the orbit. It will be performing these small thruster (in the order of centimeters per second velocity change) burns to stay ahead of the Comet while doing fine measurements of the acceleration caused by the gravity of the comet.
When the mass and mass distribution has been established, the spacecraft will eventually settle in an orbit about 20 kilometers from the comet and finally down to 10 kilometers.
When the mass and mass distribution has been established, the spacecraft will eventually settle in an orbit about 20 kilometers from the comet and finally down to 10 kilometers.
http://youtu.be/Mf1zsACcXc4