Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan
Vol 11, No 1 (2025): Al-Marshad

Refined Guidelines for Selecting Hilal Observation Points in Tropical Regions: Insights from Bengkulu City

Taman, Badrun (Unknown)



Article Info

Publish Date
30 Jun 2025

Abstract

This research evaluates the Bengkulu Provincial Government Mess as a potential site for rukyatulhilal, given that its selection has lacked a systematic, scientific foundation. The study focuses on three main aspects: first, the region’s geographical and astronomical characteristics; second, how well the chosen location aligns with established ideal parameters for crescent observation; and third, how site determination can be adapted to local conditions based on empirical findings. A qualitative approach grounded in geographical-astronomical analysis was employed. The results reveal that factors linked to the western horizon—specifically its alignment with the Indian Ocean at sea level—introduce notable meteorological disturbances, including high wave activity, strong sea breezes, and elevated water vapor content, all of which can impede visual detection of the hilal. Based on these insights, the study proposes updated criteria for selecting observation sites, recommending that optimal locations avoid a western horizon directly at sea level, particularly along the Indian Ocean frontage. 

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Journal Info

Abbrev

almarshad

Publisher

Subject

Astronomy Education

Description

Al-Marshad: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan, published by the Observatorium Ilmu Falak, University of Muhammadiyah Sumatera Utara (UMSU), Medan, Indonesia, which includes articles on the scientific research field of Islamic astronomy observatory and others. Al-Marshad: Jurnal ...