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All Journal Al-Ahkam FIKRI : Jurnal Kajian Agama, Sosial dan Budaya JURNAL LENTERA : Kajian Keagamaan, Keilmuan dan Teknologi SAMARAH: Jurnal Hukum Keluarga dan Hukum Islam Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan Istinbath: Jurnal Hukum dan Ekonomi Islam ELFALAKY: Jurnal Ilmu Falak Jurnal Alwatzikhoebillah : Kajian Islam, Pendidikan, Ekonomi, Humaniora Muẚṣarah: Jurnal Kajian Islam Kontemporer Salimiya : Jurnal Studi Ilmu Keagamaan Islam Akademika : Jurnal Pemikiran Islam Kalosara: Family Law Review JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Journal of Shoutheast Asian Islam and Society (JSEAIS) Azimuth: Journal of Islamic Astronomy
Ahmad Adib Rofiuddin
Universitas Islam Negeri Walisongo
Religion Humanities Astronomy Earth & Planetary Sciences Economics, Econometrics & Finance Education Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Journal : Salimiya : Jurnal Studi Ilmu Keagamaan Islam

 1 
HISAB AWAL WAKTU SALAT DALAM KITAB RISALAH FALAK AL-ANWAR Nur Imani Surur; Ahmad Adib Rofiuddin
Salimiya: Jurnal Studi Ilmu Keagamaan Islam Vol. 6 No. 1 (2025): Salimiya
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian kepada Masyarakat (LP3M) IAIFA Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58401/salimiya.v6i1.2070

Abstract

This study explores the method and accuracy of the initial calculation of prayer times in the book Risalah Falak Al-Anwar. This book uses a different algorithm concept. The difference lies in the data on solar declination and the equation of time used are stagnant (eternal). The calculation also does not include corrections to the altitude of the place. While other modern prayer time calculation methods use solar declination data and equation of time which are updated annually. The research method used is a literature study with data analysis from the book Risalah Falak Al-Anwar. This study produced two findings, First, the initial calculation of prayer times in the book Risalah Falak Al Anwar is included in the haqiqi tahqiqi method, because in its calculations it already uses the spherical trigonometry formula. The equation of time data is adopted from the book Nur al-Anwar and the solar declination data is calculated manually using the solar longitude difference formula. Second, the results of the calculation of prayer times in the book Risalah Falak Al Anwar are quite accurate, because the largest difference with the Ephemeris is 1 minute 51 seconds.
PENGAMATAN SYAFAQ DI KARIMUN JAWA MENGGUNAKAN ANALISA PERBANDINGAN INTENSITAS CAHAYA DAN 3D SURFACE Hawwin Chilyatina; Ahmad Adib Rofiuddin; M. Nur Iskandar Fajri
Salimiya: Jurnal Studi Ilmu Keagamaan Islam Vol. 6 No. 1 (2025): Salimiya
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian kepada Masyarakat (LP3M) IAIFA Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58401/salimiya.v6i1.2080

Abstract

The criteria for shafaq remain a matter of debate among Muslims, particularly among scholars who propose varying solar depression angles, such as -15°, -18°, -19°, -19.5°, and -20°. These differences directly affect the determination of prayer times, as the start of prayer depends on the chosen solar elevation angle. This issue is of particular concern to the Muslim community, especially in relation to the onset of the Isha prayer. In this study, the author conducts observations to examine the shafaq phenomenon. Data were collected through observations on Karimun Jawa Island using a smartphone camera (Poco F1) with ISO 1600, an 8-second shutter speed, and 15-second intervals between photos. This research employs a qualitative method with a descriptive-comparative approach by comparing two or more variables, utilizing two types of analysis: light intensity comparison and 3D Surface analysis, both using features available in the Astro ImageJ application. The study demonstrates that the shafaq phenomenon can be effectively analyzed using both methods, although differences were observed. The light intensity comparison method detected the shafaq approximately 10 minutes later than the 3D Surface analysis.
Co-Authors Adeni, Adeni Ahmad Izzuddin Ahmad Luqman Hakim Ahmad Luqman Hakim, Ahmad Luqman Ardliansyah, Moelki Fahmi Arifana Nur Kholiq asyari, ahmad muhajir Farid, Firdaus Hawwin Chilyatina Hikam, Farras Fathan Ikhsan Mahaendra Kholis, Nor M. Nur Iskandar Fajri Machzumy, Machzumy Mahsun Mahsun Maryatul Kibtyah, Maryatul Muttaqien, Ade Imam Nur Imani Surur Prastyorini*, Niken Rahman, Mohammad Zulfaiz Akbar bin Abdul Royyani, Muh Arif