Masturi, Pratiwi Dwijananti, Rahmat Doni Widodo, Sukiswo Supeni Edie, Fifin Dewi Ratnasari, Sunarno, Susilawati
Determination of the Qibla direction and the beginning of prayer times is very important for the community, especially Moslems community. The purpose of this research is to obtain a spherical trigonometry application assisted by Microsoft Excel. The application for determination of the Qibla direction, Qibla time, and the beginning of prayer times were made by using analysis and deriving several angular relations in the spherical trigonometry, the distance between the observer city and the Kaaba, the changes of the daily declination of Sun, Equation of Time (EoT) and Microsoft Visual Basic (VB) in Microsoft Excel to facilitate processing. The result of calculation using this application were compared with the application on webpage jadwalsholat.org, that it was made using the provisions of the Indonesian Religion Ministry. The result obtained is very precise and high compatibility. It can be concluded that this application can be used properly to determine the Qibla direction and the beginning of prayer time at a place on the Earth surface. © 2023 Author(s).
Physics Department, Universitas Negeri Semarang, Semarang, Indonesia; UNNES Astronomical Community, Semarang, Indonesia; Science and Education Society Institute, Semarang, Indonesia; Mechanical Engineering Department, Universitas Negeri Semarang, Semarang, Indonesia; Physics Education Department, Universitas Islam Negeri, Walisongo, Semarang, Indonesia
