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All Journal Al-Mizan (e-Journal) ELFALAKY: Jurnal Ilmu Falak Al-Hilal: Journal of Islamic Astronomy International Journal of Religion Education and Law
M. Syaoqi Nahwandi
IAIN Syekh Nurjati Cirebon
Religion Humanities Astronomy Earth & Planetary Sciences Education Law, Crime, Criminology & Criminal Justice Physics Social Sciences

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 1 
Application of Astrolabe in the Reckoning of Early Player Time M. Syaoqi Nahwandi
Al-Mizan (e-Journal) Vol. 14 No. 1 (2018): Al-Mizan
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Institut Agama Islam Negeri Sultan Amai Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.144 KB) | DOI: 10.30603/am.v14i1.740

Abstract

Astrolabe is a classical instrument in astronomy that is often used to determine the position of celestial bodies without calculating. The notables who played role in the formulation of the astrolabe concept and work system were Hipparchus, Claudius Ptolemy and Theon. Muslim astronomers also had an important role in the development of the astrolabe. The application of astrolabe in reckoning the beginning of prayer time is very easy. But before it can be applied in reckoning prayer time, the astrolabe needs to be equipped with the Sun's altitude lines at the beginning of the prayer time for one year at a location. So the astrolabe can easily be applied to reckon the beginning of prayer times without the need to do calculations. But the Sun's data on the astrolabe are constant as well as the attitude of the Sun at the beginning of prayer time. Those are what reduce the accuracy of the beginning of prayer times reckoning result with the astrolabe.
THE REFORMULATION OF ALGORITHM FOR CALCULATING STAR’S POSITION AS THE SIGN OF ISYA AND FAJR PRAYER TIMES Muhammad Syaoqi Nahwandi
Al-Hilal: Journal of Islamic Astronomy Vol 1, No 1 (2019)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (849.29 KB) | DOI: 10.21580/al-hilal.2019.1.1.5237

Abstract

The position of the stars in the sky was used by Islamic Astronomy scholars as a sign of early Isya and Fajr prayers. This method is an alternative that was used in the past when there has not been an advanced time keeping tool like nowadays, especially for locations where syafaq and fajr shâdiq phenomena cannot be observed. Some of the algorithms used for calculating the star's position as a sign of early Isya and Fajr prayers are still fairly approximation (taqrîbi). So it requires a reformulation of the algorithm to make it is suitable for use in this period. This study resulted two offers of algorithms which are obtained by reformulating al-Buraidi’s method and al-Hâsib’s: First, the culmination of stars. Second, star’s altitude and azimuth. Accuracy test of reformulation of the algorithm compared by stellar observations shows that the results in reformulation of algorithm for calculating star’s position as the sign of early Isya and Fajr prayer time are quite accurate with accuracy in units of arc minutes.
The Accuracy of Modified Gunter's Quadrant (Ver.2) in Prayer Time Calculation M. Syaoqi Nahwandi; Ahmad Izzuddin
IJRAEL: International Journal of Religion Education and Law Vol 1, No 1 (2022): October 2022
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1833.368 KB) | DOI: 10.57235/ijrael.v1i1.78

Abstract

Gunter's Quadrant is the work of Edmund Gunter in modifying the Horary Quadrant but cannot be used to accommodate the needs of Muslims in knowing prayer times. In previous research, the author has developed the Modified Gunter's Quadrant (ver.1) which can be used for calculating prayer times and has succeeded in improving the basic design of Gunter's Quadrant so that it can be made for latitudes near the equator. However, the Modified Gunter's Quadrant (ver.1) produces curves that look broken and the accuracy of the calculation results still needs to be improved because the hour curves interval is 15 minutes. The method of research used is Development Research which becomes a further development of the Modified Gunter's Quadrant (ver.1) to eliminate deficiencies in the projection concept of the hour and azimuth curves and to improve the accuracy of the calculation results of prayer times. The result of this research is the Modified Gunter's Quadrant (ver.2) which has a better curve projection method and improved accuracy with hour curve intervals of 5 minutes. The results of the accuracy test show that the Modified Gunter's Quadrant (ver.2) deserves to be used as one of the classical instruments for calculating prayer times with a maximum error of 0h 0m 53s.
RANCANG BANGUN RUBU’ MUJAYYAB SEBAGAI INSTRUMEN FALAK KLASIK Akhmad Nadirin, Akhmad Nadirin; Setyawan, Edy; Wiguna, Akhmad Faiz; Nahwandi, M. Syaoqi
ELFALAKY: Jurnal Ilmu Falak Vol 7 No 2 (2023): Desember
Publisher : UIN ALAUDDIN MAKASSAR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/ifk.v7i2.42930

Abstract

Astronomical Instruments or Astronomy is a scientific icon that is clear evidence of the development of Astronomy in classical Western and Islamic civilization. Even though the classical Falak instrument is simple, it holds extraordinary scientific treasures. Rubu' Mujayyab is an instrument used by humans to observe and calculate the positions of celestial bodies before telescopes and logarithm tables were invented. In the current era of technological development, Classical Falak Instruments such as the Rubu' Mujayyab need to be developed and adapted to technological advances into software or digital applications in order to continue to exist. This research aims to design the Javascript-based Rubu' Mujayyab application and determine the results of functionality testing and evaluation of the Javascript-based Rubu' Mujayyab digital application. This research was conducted using the Research and Development method. In this research, the classical astronomical instrument was digitally developed using the JavaScript programming language. The Falak instrument developed is Rubu' Mujayyab. This instrument is a classic astronomical instrument which is still relevant to current conditions and is widely used in studying astronomy in Madrasas, Islamic boarding schools and Islamic universities. After the digital application of the classic astronomical instrument was created, it was then validated with an instrument validation sheet by an Expert Researcher from Imah Noong, Lembang, namely Hendro Setyanto, as well as testing the functionality of the two applications. The result is a classic digital falak application, namely rubu' al-mujayyab itself. Apart from that, based on the results of functionality tests by Expert Researchers, it was found that this digital application can run and function well according to the function of the physical instrument.
Co-Authors Ahmad Izzuddin Akhmad Nadirin, Akhmad Nadirin Edy Setyawan Wiguna, Akhmad Faiz