New Moon or new Moon so bookmark the new moon in the beginning of the Islamic calendar. Hilal also so early markers of Ramadan and Eid al-Fitr.
Observation of hilal is done to determine the start of Ramadan and Eid al-Fitr.
New Moon or new moon in Arabic so bookmark the start of a new month in the Islamic calendar. Hilal also so bookmark the start of Ramadan and Eid al-Fitr.
Nutuk needs determine the appearance of the new Moon so one of encouragement for Muslim scientists in studying the science of astronomy. When the new moon was clearly visible to the naked eye, the Muslims will start counting the reckoning or appearance of the new moon.
Although the initial determination can be estimated, Ramadan remains the mengadalkan appearance of the new moon. The new monitoring done at multiple locations using a telescope admits going of the Sun.
There are several benchmark in determining the new moon elongation, altitude, i.e. the age of the Moon, phases, lag, refraction, and dip. Altitude is a quantity that indicates the altitude of a celestial object measured from the horizon into the sky object.
While elongation is the angle formed by the two celestial objects that are seen by the observer. Age of the Moon is calculated based on the difference of the setting sun with a event when the Sun and Earth are in one line in the plane of the ecliptic (the conjunction).
The lag is calculated based on the difference between the time the setting time the setting sun with moon. On the other hand is a refraction refraction of light from a celestial object by the atmosphere. While the dip is the effect of humility horizon observer.
Hilal is deemed visible if it meets the following requirements:
when the sun sets, its altitude is not more than 2 degrees and angle elongasinya are no less than 3 degrees.
When the Moon sets, the Moon's age is not less than 8 hours after ijtimak/conjunction applies.
When the new moon is sighted, the religious Ministry will conduct the trial isbat to determine the start and end of Ramadan.
This year, the Council of isbat will be conducted today (15/5) at 16.00 WIB. Team Reckoning and Sighting Kemenag will expose the position of hilal admits the beginning of Ramadan 1439 h. after the Maghrib prayer, Kemenag will make a decision early assignment of Ramadan based on reports the results of the monitoring of the location of hilal sighting – Islamic.