Real-time satellite tracking in a Google Maps mashup

One of the latest Google Maps applications discussed on Google Maps Mania is actually ON-TOPIC for this blog! This mashup provides real time tracking for all known satellites. (This may not be true but I dare ya' to find which one isn't there!) You select the satellite you want, and its location is displayed as a graphical icon on a Google map (to the right is a display for HST). You can of course, zoom and pan the map, however, if you pan it it moved back to the current satellite position. The path from the point of initial display is marked graphically. You can access a textual list of all supported satellites and can also see the passes 'visible' from your position over the next 48 hours (time, az-el). The right sidebar shows a wealth of info about the chosen bird, such as the following for HST:

Satellite info
Name: HST
NORAD ID: 20580
Int'l Code: 1990-037B
Perigee: 564 km
Apogee: 569 km
Inclination: 28.5°
Period: 96 min
Launch date: 1990-04-24
Comments: The Hubble Space Telescope (HST) was the first and flagship mission of NASA's Great Observatories program. Designed to complement the wavelength capabilities of the other spacecraft in the program (CGRO, AXAF, and SIRTF), HST was a 2.4 m, f/24 Ritchey-Chretien telescope capable of performing observations in the visible, near-ultraviolet, and near-infrared (1150 A to 1 mm).

Current satellite position
Latitude: 17.3°
Longitude: -91.02°
Azimuth: 213.35°
Elevation: -1.54°
Altitude: 566.61 km
Speed: 7.27 km/s
RA: 21h 27m 28s
Dec: -42° 40' 19''
Currently the satellite is below your horizon