Preliminary Determination of Ramadan BMKG Release July 19.
Determination of the beginning of Hijri month is very important for Muslims. Meteorology, Climatology, and Geophysics (BMKG) will provide data Hilal Information at sunset on Thursday, July 19, 2012.
Preliminary determination of Ramadan 1433 H will use several methods of observation, among others, the conjunctions (astral conjunction ‘) and the setting sun.
BMKG will monitor geosentrik or astral conjunction conjunctions. This event occurs when the trajectory of the sun and moon EDAR exactly the same. This event will occur on Thursday, July 19, 2012, at 04:24 UT or 11:24 am or at 12:24 am PST or 13:24 pm CDT. At that time the sun and moon together are right at 116.912 degrees with a distance of 4.082 degree angle.
In addition to the conjunctions, the sunset can also be a determinant. Sunset time is expressed when the top disk of the sun right at the point of the horizon. Based on this observation, the sun sets in the region of Indonesia on July 19, 2012 The earliest occurred at 17:35 CET in Merauke and most end at 18:57 pm at the Sabang.
Astronomically, the execution time Rukyat Hilal in the region of Indonesia is after sunset date of July 19, 2012.