تحديد موعد حلول الفجر الصادق في الأردن بالرصد الفلكي المباشر بالعين المجردة

الملخص EN

A group of the Jordanian Astronomical Society, their friends and some olama had conducted an observational experiment for the true dawn in four localities in Jordan.

Twelve observational sessions were successfully achieved throughout the year 1430/1431 AH (2009/2010 AD).

The weather was variable from clear to rather dusty or cloudy.

Except in two sessions, darkness was good enough for observation by the naked eye.

It was clear that true dawn must be observed in complete darkness away from illuminated cities.

Consequently, timing of the beginning of the true dawn in cities should be rejected because it is usually 20-30 minutes later than the observed time.

True fajr was observed 4-5 minutes after the beginning of A’than ul Fajr in Amman by part of the observers, and one time, 5 minutes by the whole group (tayakkon).

If the observing conditions were a little better, we could have seen it at the beginning of A’than.

Thus, it is recommended to keep the time of A’than ul Fajr as it is now; i.e.

when the sun is at 18o below the eastern horizon.

It is also accepted to delay A’than by 5 minutes only to be sure of the right timing (tayakkon).