دراسة احصائية فلكية لتقييم مدي التطابق بين الروية البصرية و الحسابات الفلكية في تحديد اوائل بعض الاشهر الهجرية في العراق

In this study we have studied 84 Cases of the beginning of Mohharam, Ramadhan, Shawwal and the Al- Hijjah by collecting the data from the ministry of religious endowments and the former daily newspapers and the a weekly magazine (Al- Thawra, Al-Iraq, Al- Jumhuriah, Alef Baa Magazine), to know the correspondent range, the beginnings of the refereed months which had been declared officially have been compared with the astronomical calculation on the base of the vision condition. This study found that the Correspond Range ration (with regard to the vision) when crescent was above of Horizon to 64.91%, (i.e.) from 57 cases which was crescent was above of Horizon, 37 was found Corresponded with astronomical calculations with vision and 20 cases on Correspond, that is 35.09 % .