Please enter your geographical coordinates in decimal notation,
negative for western longitudes and southern latitudes. Altitude must be provided in meters.
Example for Tokyo, Japan:
Latitude: 35.67
Longitude: 139.767
Altitude: 20
Example for Cuzco, Peru:
Latitude: -13.518
Longitude: -71.978
Altitude: 3360
No need to worry about your time zone which is automatically compensated for by the star chart server eliminating need for entering zone time and daylight saving offsets.
If in doubt, please pinpoint your geographical coordinates and altitude from this external database:
www.heavens-above.com