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 Perth

AustraliaOceania-31.95°, 115.86°

28 Shawwal 1447 AH · Fri, Apr 17, 2026

Visibility Prediction
0/7 thresholds met
-31.9505, 115.8605Fri, Apr 17, 2026·28 Shawwal 1447 AHAustralia/Perth

Dhul Qi'dah 1447 AH

New Moon (Conjunction): 2026-04-17 11:51:48 UTC

PT: 04:51:48MT: 05:51:48CT: 06:51:48ET: 07:51:48
0%confidence
Not Possible

Sunset

17:53

Moonset

17:29

Astronomical Parameters

Moonset Lag-23.7 min
Moon Age-2.0 hrs
Moon Altitude-5.6 °
Elongation4.9 °
Illumination0.0 %
ARCV-4.7 °
Crescent Width0.1 ′
Upcoming Islamic Months in Perth

Dhul Qi'dah 1447 AH

Mon, Apr 20, 2026

88% Very Likely

Dhul Hijjah 1447 AH

Tue, May 19, 2026

78% Very Likely

Muharram 1448 AH

Wed, Jun 17, 2026

75% Very Likely

Safar 1448 AH

Thu, Jul 16, 2026

70% Likely

Rabi al-Awwal 1448 AH

Sat, Aug 15, 2026

99% Very Likely

Rabi al-Thani 1448 AH

Sun, Sep 13, 2026

92% Very Likely

Moon Sighting in Oceania

Oceania presents unique crescent moon sighting conditions, with cities spanning from Perth in Western Australia to Auckland in New Zealand. Southern hemisphere locations experience reversed seasonal patterns compared to the Northern hemisphere, affecting crescent visibility timing.

Muslim communities in Australia, New Zealand, and the Pacific Islands rely on accurate Hilal predictions tailored to their specific locations. Our system accounts for each city's precise coordinates, delivering reliable forecasts for Islamic month determinations in this diverse region.

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 Perth

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 Perth are based on local crescent moon visibility and may differ from other regions.

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