%0 Journal Article
%A T. B., Ramadhan
%A T., Djamaluddin
%A J. A., Utama
%D 2014
%F UNY:11520
%I Yogyakarta State University
%J Proceeding of International Conference On Research, Implementation And Education Of Mathematics And Sciences 2014
%K Hilaal, Hisab, Rukyat, Hilaal Visibility Criteria in Indonesia.
%T RE-EVALUATION OF HILAAL VISIBILITY CRITERIA  IN INDONESIA BY USING INDONESIA AND INTERNATIONAL  OBSERVATIONAL DATA
%U http://eprints.uny.ac.id/11520/
%X This study using data of hilaal observation compiled by the Ministry of Religious  Affairs (MORA) Republic of Indonesia during 1962-2011 period, the observational  data of Rukyatul Hilal Indonesia (RHI) during 2007-2009 period and Odeh’s  international observational data during 1859-2005 period. Those data were selected  by applying selection procedure of Djamaluddin (2001) and by eliminating hilal data  whose angular distance < 3° between hilaal and particular planet. Next, selected data  were plotted to graphic of Sun-Moon altitude difference (ARCV - Arc of Vision) and  Sun-Moon angular distance (ARCL - Arc of Light), moon age and Sun-Moon  angular distance (ARCL - Arc of Light) and Sun-Moon altitude difference (ARCV -  Arc of Vision) and Sun-Moon angular distance (DAz - Delta Azimuth) to propose  the new hilaal visibility criteria in Indonesia. The new criteria proposed are ARCL  greater than 5.4°, Moon is as old as 9.4 hours after conjuction and  = 3° if DAz 5°  ARCV  -0.719(DAz)+6.795 if DAz < 5°       .