Showing the orbits of 443 satellites (at current count), the NASA satellite tracker, J-Track gives a real-time animation of their paths around the Earth.

The page requires the latest version of Java and users will probably need to update prior to launching the application (pay no attention to the request for a "JAVA Updagrade" [sic]).

Uses are able to select individual satellites either from a drop-down list or by simply clicking on any item on-screen.  This will show the full orbit along with positional and orbital data.

NASA warns on the front page, "This application serves as an educational tool and may not be completely accurate due to time discrepancies in the users' browser, updates to satellite orbital data, etc; it is not an official NASA satellite tracking tool. We are currently developing an improved satellite tracker using modern browser-based technology and hope to have this available in 2012. Stay tuned!"

Users should take note of the navigation short-cuts listed on the web page prior to launching the tracker as they don't appear to be listed anywhere in the running application.

The J-Track satellite tracker is available here.  Users who would prefer to ask the alternate question of "what satellites are visible from my location?" might prefer to use the NASA SkyWatch page which requests that users select a location and the name of a satellite. 

Note that there is currently a bug on the SkyWatch page as iTWire was amused to note that the next pass of the International Space Station over Melbourne was at 01:45 on January 32nd.  We suspect this was a date roll-over error and should have 31 subtracted from the date, meaning that the ISS will be passing almost directly over us in the early hours of New Year.