الحسابات الفلكية

The Astronomical Calculations app is a specialized tool for calculating the crescent moon's visibility and determining the beginning of the Islamic months with high accuracy.

Features:

• Crescent moon visibility calculation using three international standards: Yallop (1997), Odeh (2006), and Mapimus (2021)

• Monthly lunar calendar displaying the moon's phases for each day

• Positions of the five visible planets (Mercury, Venus, Mars, Jupiter, and Saturn)

• Comparison of crescent moon visibility across multiple cities simultaneously

• 28 integrated Arab and Islamic cities

• GPS location support
• Sharing observation results as images
• Customizable settings for default and favorite cities

Accuracy and Technology:

• Calculating engine based on the VSOP87 theory for calculating celestial body positions

• Calculating accuracy up to ±10 arcseconds

• Works entirely offline

• All calculations are performed locally on your device

This app is designed for astronomers and those interested in astronomy, crescent moon observation, and determining the beginnings of Islamic months.