Determination of Ramadan start with Hilal prediction during sunset on March 22


Meteorology Climatology and Geophysics Council (BMKG) share information about the hilal forecast at sunset today to determine the start of Ramadan 1444 Hijriah. The data is shared with policy makers (stakeholder).

“BMKG provides scientific considerations to stakeholder (Ministry of Religion, etc.) in determining the start of the Hijri month,” the BMKG wrote as reported on its website, Wednesday (22/3/2023).

The BMKG shares this data because one of its main tasks and functions is to provide services for marking the time and position of the moon and sun.

As is well known, the Hijri calendar (kamariyah) used by Muslims in daily time management is based on the regular circulation of the moon around the earth, and the earth and the moon around the sun.

“Determination of the beginning of the Hijri month is very important for Muslims because it relates to the time of worship, especially the months of Ramadan, Shawwal and Zulhijah,” he explained.

In addition to providing information on hilal data from reckoning (calculations), BMKG also carries out hilal sightings (observations) at 29 locations in Indonesia. The hilal monitoring can be witnessed online online (live streaming) here.

The information presented here includes:

1. Conjunction Time (Ijtima’) and Sunset Time
2. Crescent Altitude Map
3. Elongation Map
4. Moon Age Map
5. Peta Lag
6. Map of Illuminated Fractions of the Moon
7. Other Astronomical Objects that Potentially Confound the New Moon Rukyat
8. Hilal Data at Sunset for Cities in Indonesia

Read more here.

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