Prayer Times

The Prayer Time Table of Tromsø has been carefully completed for Tromsø city, based on the very special location of the particular city. Tromsø’s location with regards to latitude (N:69^o39) and longitude (E:18^o56) give rise for periods of Dark and Light during the winter and summer months respectively. Additionally, this location contributes to longer twilight times than normally found in places around the  equator. The principles used for the calculation of prayer times are:

Sunrise and Maghrib; For computational purposes, sunrise or sunset is defined to occur when the geometric zenith distance of centre of the Sun is 90.8333 degrees. That is, the centre of the Sun is geometrically 50 arcminutes below a horizontal plane. For an observer at sea level with a level, unobstructed horizon, under average atmospheric conditions, the upper limb of the Sun will then appear to be tangent to the horizon. The 50-arcminute geometric depression of the Sun's center used for the computations is obtained by adding the average apparent radius of the Sun (16 arcminutes) to the average amount of atmospheric refraction at the horizon (34 arcminutes). These measurements are annualy carried out by the Norwegian Almanac. In the present time table the times of year 2008 have been used. 3 minutes are added to sunset time to denote the start of Maghrib prayer to account for fluctuations between years.