Astroislamica: Journal of Islamic Astronomy
Vol. 4 No. 2 (2025): Astroislamica: Journal of Islamic Astronomy (Desember)

Assessment of Qibla Direction Accuracy at Tanwir Mosque, Surabaya,Using Theodolite Measurements

Alfira Rahma Fauziah (Universitas Islam Negeri Sunan Ampel Surabaya)



Article Info

Publish Date
31 Dec 2025

Abstract

Every Muslim is obliged to perform the five daily prayers, the validity of whichis contingent upon the fulfillment of several essential conditions, one of which is observing the prescribed prayer times. In addition, the orientation toward the Qibla constitutes a fundamental requirement that must be determined accurately based on geographical location. Regions situated to the east of the Kaaba are required to face westward in determining the Qibla direction, and conversely, regions located to the west must face eastward. This study aims to examine the accuracy of the Qibla direction at the Tanwir Mosque in Surabaya using a theodolite. The research employed a field-based observational method to obtain precise empirical data. The theodolite, as a modern surveying instrument, is widely recognized for its high level of precision in angular measurements. The findings indicate that minor discrepancies exist among measurements obtained using different instruments; however, these differences remain within acceptable tolerance limits. Compared to other measurement tools, the theodolite demonstrates the highest degree of accuracy. This research is significant in ensuring the correctness of the Qibla direction and in enhancing public awareness regarding the importance of precision in the performance of religious worship.

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Journal Info

Abbrev

ASTROISLAMICA

Publisher

Subject

Religion Astronomy

Description

Astroislamica: Journal of Islamic Astronomy is a journal that studies Islamic astronomy and Islamic laws related to astronomy. Astroislamica focuses on Islamic astronomy topics such as Qibla direction, prayer times, calendars, and eclipses through multiple perspectives, including Islamic law, ...