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THE REFORMULATION OF ALGORITHM FOR CALCULATING STAR’S POSITION AS THE SIGN OF ISYA AND FAJR PRAYER TIMES

Al-Hilal: Journal of Islamic Astronomy

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Title THE REFORMULATION OF ALGORITHM FOR CALCULATING STAR’S POSITION AS THE SIGN OF ISYA AND FAJR PRAYER TIMES
 
Creator Nahwandi, Muhammad Syaoqi
 
Subject Star’s Position, Prayer Times, Reformulation of Algorithm
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Description 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.
 
Publisher Fakultas Syari'ah dan Hukum UIN Walisongo
 
Contributor —
 
Date 2020-07-21
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
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Format application/pdf
 
Identifier https://journal.walisongo.ac.id/index.php/al-hilal/article/view/5237
10.21580/al-hilal.2019.1.1.5237
 
Source Al-Hilal: Journal of Islamic Astronomy; Vol 1, No 1 (2019)
2775-2119
2775-1236
 
Language eng
 
Relation https://journal.walisongo.ac.id/index.php/al-hilal/article/view/5237/2765
 
Rights Copyright (c) 2020 al-Hilal: Journal of Islamic Astronomy