



Java applet Apparent Movement of a Star (on this server, with kind permission of Walter Fendt ).



The azimuth angle Az of the Sun or a celestial body (St) is depending on it's declination Dec and altitude Alt, and on the latitude Lat of the observer (Astronomical/Nautical Triangle):





At sunrise (Alt=0°) the formula is more simple:







The following diagram is showing the azimuth angle at sunrise for different declinations (Dec=0°, 5°, 10°, 15°, 20°, 23.4°) as a function of latitude:









Using the Local Hour Angle (LHA) the azimuth angle is given by:







