Integrasi Hisab Rukyat Awal Ramadan 1442 H dengan Model Visibilitas Kastner

This study examines the determination of the beginning of Ramadan 1442 H by integrating hisab and rukyat through Kastner’s crescent visibility model.

The analysis evaluates the astronomical feasibility of reported crescent observations and demonstrates how quantitative visibility modeling can contribute to the assessment of rukyatul hilal evidence and the refinement of Hijri calendar criteria.