Moon Sighting
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Moon Sighting

Islamic crescent moon visibility predictions powered by astronomical calculations and machine learning.

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Data Sources

  • JPL DE421 Ephemeris (NASA)
  • CrescentWatch.org observations
  • MoonSighting.org.co.uk observations
  • Chicago Hilal Committee observations
  • Skyfield astronomical library

Methodology

  • 7 astronomical visibility parameters
  • ML Random Forest model
  • 2,000+ historical training records
Feedback & Feature Requests

Moon Sighting Project · Astronomical predictions are estimates and should be used alongside traditional moon sighting practices

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Moon Sighting in Medan

IndonesiaSoutheast Asia3.60°, 98.67°

28 Dhul Hijjah 1447 AH · Mon, Jun 15, 2026

Visibility Prediction
0/7 thresholds met
3.5952, 98.6722Mon, Jun 15, 2026·28 Dhul Hijjah 1447 AHAsia/Jakarta

Muharram 1448 AH

New Moon (Conjunction): 2026-06-15 02:54:10 UTC

WIB: 09:54:10MYT: 10:54:10PHT: 10:54:10ICT: 09:54:10
0%confidence
Not Possible

Sunset

18:35

Moonset

18:56

Astronomical Parameters

Moonset Lag20.4 min
Moon Age8.7 hrs
Moon Altitude3.5 °
Elongation6.1 °
Illumination0.2 %
ARCV4.3 °
Crescent Width0.1 ′
Upcoming Islamic Months in Medan

Muharram 1448 AH

Wed, Jun 17, 2026

97% Very Likely

Safar 1448 AH

Thu, Jul 16, 2026

89% Very Likely

Rabi al-Awwal 1448 AH

Sat, Aug 15, 2026

99% Very Likely

Rabi al-Thani 1448 AH

Sun, Sep 13, 2026

86% Very Likely

Jumada al-Ula 1448 AH

Tue, Oct 13, 2026

96% Very Likely

Jumada al-Thani 1448 AH

Wed, Nov 11, 2026

67% Likely

Moon Sighting in Southeast Asia

Southeast Asia is home to the world's largest Muslim-majority country, Indonesia, along with significant Muslim populations in Malaysia, Brunei, Thailand, and the Philippines. The region's equatorial and tropical latitudes generally provide favorable crescent sighting conditions year-round.

From Jakarta and Kuala Lumpur to Manila and Bangkok, our predictions account for each city's specific astronomical conditions. Southeast Asian locations often benefit from consistent sunset patterns and relatively high moon altitudes, though monsoon cloud cover can affect practical visibility.

How Our Predictions Work

Our system calculates five key astronomical parameters at sunset: moonset lag, moon age, moon altitude, sun-moon elongation, and illumination percentage. These are fed into a machine learning model trained on over 2,000 historical crescent sighting observations to produce a confidence score from 0% to 100%.

Moonset Lag

≥ 45 min

Moon Age

≥ 21 hrs

Altitude

≥ 8°

Elongation

≥ 10°

Illumination

≥ 0.9%

Upcoming Islamic Events in Medan

Ramadan 2026

The holy month of fasting, prayer, and reflection observed by Muslims worldwide.

Eid al-Fitr 2026

The Festival of Breaking the Fast, celebrating the end of Ramadan.

Eid al-Adha 2026

The Festival of Sacrifice, the holiest of the two Islamic holidays, marking the culmination of Hajj.

Islamic New Year 2026

The first day of Muharram, marking the beginning of a new Islamic (Hijri) year.

Event dates for Medan are based on local crescent moon visibility and may differ from other regions.

More Cities in Southeast Asia

Jakarta

Indonesia

Surabaya

Indonesia

Bandung

Indonesia

Aceh (Banda Aceh)

Indonesia

Kuala Lumpur

Malaysia

Penang

Malaysia

Johor Bahru

Malaysia

Kota Bharu

Malaysia