Calculate Altitude and Azimuth of a Star

Right Ascention of Star     Declination of Star (place only positive numbers, southern - negative- values clicking South)
Hour Min Sec              Deg  Min   Sec North South

Greenwich Mean Time (UT)
Year  Month   Day   Hour  Min   Sec

Latitude and Longitude of the measurement location
Latitude:    Deg min sec North South
Longitude: Deg min sec East West

Click on Button:

Additional Information:
Julian Day at UT0:
Greenwich Mean Sidereal Time (GMST): hours minutes seconds
Local Sidereal Time (LST): hours minutes seconds
Local Hour Angle (LHA) of hours minutes seconds
Greenwich Hour Angle (GHA) of hours minutes seconds
Sidereal Hour Angle (SHA) of degrees minutes seconds

Mathematical Background of Calculation of a Star's Altitude and Azimuth

Latitude and Longitude using two star's altitude
(Good method,when you see many stars)

Calculate Position from one star's azimuth and altitude
(No so good as two star's altitude method, but
suitable for emergency situations when there is only one star visible)

Navigation, Astronavigation, Positioning, Geodesy