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All Journal Ulul Albab: Jurnal Studi dan Penelitian Hukum Islam International Journal Ihya' 'Ulum al-Din AL-SULTHANIYAH
Djamaluddin, Thomas
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Religion Arts Humanities Law, Crime, Criminology & Criminal Justice Social Sciences

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Exploring the New Moon during the Time of Prophet Muhammad Using Digistar 6 Planetarium Nurkhanif, Muhammad; Djamaluddin, Thomas; Izzuddin, Ahmad; Ahmad, Mohd Razlan
International Journal Ihya' 'Ulum al-Din Vol. 26 No. 2 (2024)
Publisher : Universitas Islam Negeri Walisongo Semarang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/ihya.26.2.23503

Abstract

This article aims to present a digital visualization of the new moon (hilal) as a determinant of the beginning and end of Ramadan fasting, exploring the astronomical phenomenon of hilal visibility during the Prophet Muhammad's era using the Digistar 6 system in a planetarium. Several Islamic jurisprudence (fiqh) literatures discuss comparisons of fasting durations during the Prophet's time, ranging between 29 and 30 days. This study employs a qualitative research method based on library research, utilizing an astronomical approach and simulation observations in a planetarium. The data used include historical and astronomical data from the Prophet Muhammad's era, as well as related classical literature. The findings of the study include the integration of Digistar 6 technology with computational data to reconstruct the hilal phenomena of the Prophet’s time. For instance, the elevation of the hilal marking the beginning of Syawal in 8 AH was observed at a minimum Moon Altitude of 02°06’22” above the horizon, with an elongation of 04°55’56” and an atmospheric clarity of 9.52%. The Prophet Muhammad observed Ramadan fasting nine times, with six instances involving 29 days of fasting and the remaining three involving 30 days, as determined through simulated physical imagery of the hilal.
Transformation of Prayer Time Schedules: from A Static-Passive to A Dynamic-Variative Perspective Riza, Muhammad Himmatur; Djamaluddin, Thomas; Izzuddin, Ahmad
Ulul Albab: Jurnal Studi dan Penelitian Hukum Islam Vol 6, No 1 (2022): Vol. 6, No. 1, October 2022
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jua.v6i1.22826

Abstract

Prayer times are extremely important for Muslims, as they serve as a guide for the beginning of prayer times. However, there are still people who do not fully understand the impact of changes in the position of the Sun, which causes the start of prayer times to change daily. Additionally, some people still use perpetual prayer time schedules. Although they use the term "perpetual," in reality, prayer time schedules are not everlasting, as they cannot be used over long periods. This research is a library study with a phenomenological-astronomical approach. The results of this study show that prayer times change every day. Someone who believes that the start of Maghrib prayer is always at 18:00 WIB and the start of Fajr prayer is always at 04:30 WIB may find that on some days, their prayer or fasting is invalid, as the start of Maghrib prayer may occur between 18:01 and 18:08 WIB and the start of Fajr prayer may occur between 04:31 and 04:34 WIB. These changes can serve as an understanding for the community that the correctness of prayer time schedules is not static-passive but dynamic-variable. This means that the start of prayer times each day and year is not always the same as the following days and years, and the changes vary. Therefore, this study provides a scientific guide for the community to better understand and be cautious in using prayer time schedules, considering that the beginning of prayer times determines the validity of a Muslim's prayer.
Exploring the New Moon during the Time of Prophet Muhammad Using Digistar 6 Planetarium Nurkhanif, Muhammad; Djamaluddin, Thomas; Izzuddin, Ahmad; Ahmad, Mohd Razlan
International Journal Ihya' 'Ulum al-Din Vol. 26 No. 2 (2024)
Publisher : Universitas Islam Negeri Walisongo Semarang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/ihya.26.2.23503

Abstract

This article aims to present a digital visualization of the new moon (hilal) as a determinant of the beginning and end of Ramadan fasting, exploring the astronomical phenomenon of hilal visibility during the Prophet Muhammad's era using the Digistar 6 system in a planetarium. Several Islamic jurisprudence (fiqh) literatures discuss comparisons of fasting durations during the Prophet's time, ranging between 29 and 30 days. This study employs a qualitative research method based on library research, utilizing an astronomical approach and simulation observations in a planetarium. The data used include historical and astronomical data from the Prophet Muhammad's era, as well as related classical literature. The findings of the study include the integration of Digistar 6 technology with computational data to reconstruct the hilal phenomena of the Prophet’s time. For instance, the elevation of the hilal marking the beginning of Syawal in 8 AH was observed at a minimum Moon Altitude of 02°06’22” above the horizon, with an elongation of 04°55’56” and an atmospheric clarity of 9.52%. The Prophet Muhammad observed Ramadan fasting nine times, with six instances involving 29 days of fasting and the remaining three involving 30 days, as determined through simulated physical imagery of the hilal.
Paradigma Penentuan Awal Waktu Subuh: Tinjauan Fikih dan Ilmu Falak Akbar, Reza; Djamaluddin, Thomas; Izzuddin, Ahmad; Nurkhanif, Muhammad
AL-SULTHANIYAH Vol. 14 No. 2 (2025): AL-SULTHANIYAH
Publisher : Institut Agama Islam Sultan Muhammad Syafiuddin Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37567/al-sulthaniyah.v14i2.4435

Abstract

Determining the Beginning of Fajr Time is an important issue that requires synergy between scientific and shar‘i approaches. The fajr ṣādiq (true dawn) as the indicator marking the beginning of Fajr time has become the main focus of various astronomical studies and fiqh discussions. However, the criteria for determining Fajr time remain a matter of debate to this day. This study employs a qualitative-descriptive approach through library research to reconstruct the paradigm of dawn observation based on the integration of astronomy (‘ilm al-falak) and Islamic jurisprudence (fiqh). The findings show that the paradigm for determining the beginning of Fajr time is grounded in identifying the earliest, most accurate, and objective appearance of the fajr ṣādiq. The analogical approach to determining the beginning of the Hijri month reinforces the scientific principle of dawn observation, namely the use of the lowest threshold criterion in identifying the first astronomical phenomenon that signifies a change in time. The application of this principle, as adopted by LF PBNU, reflects a shared paradigm between science and fiqh in affirming the boundaries of worship times both empirically and normatively.
Co-Authors Ahmad Izzuddin Ahmad, Mohd Razlan Akbar, Reza Muhammad Himmatur Riza Nurkhanif, Muhammad