Drag Camera Around an Object With Kinect (Official Plug-In)

Hello. My second question here. I'm building a solar system for a school project. People will be able to have a look at the planets and get information about them. While observing a planet, they should be able to "grab" the scene (Main camera) and rotate around the focused planet.

How can I make this happen? Thank you.

P.S. I'm using Kinect for Windows v2 with official Microsoft SDK v2 with official Microsoft Unity Plug-In