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All Journal Al-Manahij: Jurnal Kajian Hukum Islam Al-Mizan (e-Journal) Islam Futura Jurnal Al-Ijtimaiyyah Jurnal Akuntansi dan Pembangunan (JAKTABANGUN) International Journal Ihya' 'Ulum al-Din Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan Islamic Review : Jurnal Riset dan Kajian Keislaman Al-Qalam Jurisprudensi: Jurnal Ilmu Syariah, Perundang-undangan, Ekonomi Islam Manhaj: Jurnal Penelitian dan Pengabdian Masyarakat Ihsan: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Multidisiplin ELFALAKY: Jurnal Ilmu Falak Qisthosia Al-Hilal: Journal of Islamic Astronomy Al-Muamalat : Jurnal Ekonomi Syariah Al-Afaq: Jurnal Ilmu Falak dan Astronomi Al-Manahij : Jurnal Kajian Hukum Islam Syarah: Jurnal Hukum Islam dan Ekonomi Astroislamica: Journal of Islamic Astronomy Jurnal Malikussaleh Mengabdi Ameena Journal
Ismail Ismail
Universitas Islam Negeri Sultanah Nahrasiyah Lhokseumawe
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Analisis Tingkat Kecerahan Langit Malam Terhadap Visibilitas Hilal Menggunakan Sky Quality Meter di Observatorium Malikussaleh IAIN Lhokseumawe Devina Kharida Alhan; Ruslandi Ruslandi; Ismail Ismail
Astroislamica: Journal of Islamic Astronomy Vol. 4 No. 1 (2025): Astroislamica: Journal of Islamic Astronomy (Juni)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47766/astroislamica.v4i1.3374

Abstract

In the dark of the night, the sky offers wonders like the crescent moon (hilal), which marks the beginning of the Islamic month. The hilal is often observed at the Malikussaleh Observatory, IAIN Lhokseumawe. This study uses a Sky Quality Meter (SQM) to measure the night sky brightness and how it affects hilal visibility. This field research employs a qualitative approach with a descriptive method. Primary data is obtained from direct observations using the SQM before and after sunset, while secondary data comes from relevant literature. The study finds that the night sky brightness at the observatory is Class 5 on the Bortle Scale, with an average of 19.80 MPSAS, categorized as Suburban Sky. The average brightness during hilal observation is -3.03397 v mag, while the hilal magnitude is -7.36 v mag. Therefore, the hilal can be observed if its magnitude is lower than the night sky brightness.
Penentuan Azimut Kiblat Masjid Kampus UIN Sultanah Nahrasiyah Lhokseumawe Menggunakan Rumus Segitiga Bola Berbasis Python Ravik Walhidayah; Ismail Ismail
Astroislamica: Journal of Islamic Astronomy Vol. 4 No. 2 (2025): Astroislamica: Journal of Islamic Astronomy (Desember)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47766/astroislamica.v4i2.6012

Abstract

Prayer time is a compulsory act of worship for Muslims, the validity of which depends on the fulfillment of specific conditions, one of which is facing the qibla, the direction of the Kaaba in the Masjid al-Haram, Makkah. Therefore, accurate determination of the qibla direction is a crucial aspect of performing prayer. Various methods have been used to determine the qibla direction, such as the annual Rashdul Qiblah phenomenon and calculations based on spherical trigonometry. The Rashdul Qiblah method is simple and accurate; however, its application is limited to specific times. In contrast, spherical trigonometry can be applied at any time and offers high precision, but the calculation process is relatively complex and prone to human error. This study aims to implement spherical trigonometry using the Python programming language to simplify the process of qibla direction determination and to evaluate its accuracy. The research employs a library research method with a computational simulation approach. The qibla direction is calculated by inputting the latitude and longitude coordinates of the location and the Kaaba into a Python program, and the results are then compared with field measurement data obtained using a theodolite. The results show that the Python-based qibla direction calculation produces an azimuth value with a difference of 32.62 arcseconds compared to the theodolite measurements. This difference is considered very small and does not practically affect the accuracy of the qibla direction. Therefore, the proposed method is proven to be accurate, efficient, and suitable as a modern alternative for determining the qibla direction.
State, Ulama, and Local Culture: A Trilogy Framework Characterizing Indonesia’s Distinctive Fiqh in the Official Isbat Hearing Ismail Ismail; Ardiyansyah Ardiyansyah; Muhammad Khalil Mubarraq
Jurisprudensi: Jurnal Ilmu Syariah, Perundang-Undangan dan Ekonomi Islam Vol. 18 No. 2 (2026): Jurisprudensi: Jurnal Ilmu Syariah, Perundang-Undangan dan Ekonomi Islam
Publisher : Fakultas Syariah IAIN Langsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32505/jurisprudensi.v18i2.13338

Abstract

Ideally, determining the beginning of the Hijri month is viewed purely as a dogmatic religious procedure. However, in reality, the isbat hilal (crescent moon determination) hearing in Indonesia operates as a complex socio-legal phenomenon fraught with negotiation. This study aims to analyze this process as a distinctive manifestation of Indonesian fiqh (Islamic jurisprudence) that integrates the modern state, traditional religious authority, and local cultural wisdom. Employing a socio-legal approach and a qualitative legal study, this research analyzes government regulations, isbat hearing outcomes, and fatwas of the Indonesian Ulema Council (MUI). The findings reveal that the isbat hilal process forms a non-dichotomous hybrid authority model: the state acts as a constitutive facilitator and final arbiter, the ulema contribute epistemic authority through rukyat (moonsighting) and hisab (astronomical calculation), while the local culture of musyawarah untuk mufakat (deliberation for consensus) transforms it into a dynamic space for negotiation. This study contributes to reinforcing the trilogy framework of Indonesian fiqh, which pragmatically reconciles textual Islamic law, science, and the archipelago's socio-cultural context into a functional legal decision.
Co-Authors Abdul Ghofur Abdul Ghofur Ardiyansyah Ardiyansyah Arwin Juli Rakhmadi Bastiar Bastiar Cut Nazar Mutia Hanum Devina Kharida Alhan Dikson T. Yasin Hariyadi Putraga Hasna Tuddar Putri Hasna Tuddar Putri Hasna Tuddar Putri Husnaini Husnaini Kamilan, Ikhsan Laiyina Ukhti Laiyina Ukhti Laiyina Ukhti Mahzan Mahzan Marataon Ritonga Maulana, Nora Muhammad Dimas Firdaus Muhammad Fauzi Muhammad Khalil Mubarraq Muhammad Khalil Mubarraq Muksal Mina Mulyani, Rita Mutia, Intan Najwa Aulia Putri Nazaruddin Nazaruddin Neo Agustina Rasyidin Rasyidin Ravik Walhidayah Ravik Walhidayah Rizqi Wahyudi Ruslandi Ruslandi Safwan Safwan, Safwan Saifuddin Dhuhri Syahri Ramadhani T. Yasin, Dikson Walhidayah, Ravik Zulfiah