NAKED EYE ESTIMATES OF MORNING PRAYER AT TUBRUQ OF LIBYA
DOI:
https://doi.org/10.21580/al-hilal.2021.3.2.8625Keywords:
Naked eye, Mediterranean and desert area, beginning of twilight, True Dawn.Abstract
Naked eye observations at Tubruq sky (φ = 32° 05´, λ = 23° 59´) in Libya at the Mediterranean coast (see-desert background) during the two years (2008 – 2009) of morning twilight have been recorded. These observations led us to get some estimates about morning twilight, as it is necessary to determine the time of the True Dawn (Al-Fajr Prayer Time). this research aims to determine the correct time of Al-Fajr Prayer by finding the accurate angle of the sun vertical depression below the horizon that is associated with legitimate mark. The Methode used in this research was field research while the observations have been recorded by monitoring the first white thread on the eastern horizon (True Dawn) that announces the time of the Morning Prayer (Al-Fajr Prayer). The azimuthally range of observation about the solar vertical extends from 0° up to ±20°, while the phenomenon was followed from 0° up to 20° along the altitudinal range. This research gives a result that a beginning of the morning twilight is estimated to be around 13.5° depression of the sun below the horizon. This value can reach a minimum depression around 11.5° at low visibility and a maximum around 13.5° at a very god visibility.
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References
Allen, Clabon Walter. Astrophysical quantities. London: Athlone Press, 1973.
Aziz, Abdul Lateef Bin Abdul. Perpetual Prayer Time Table for the Whole World. Pakistan: Abdul Majeed Qureshi, 1986.
Henden, Arne A, dan Ronald H Kaitchuck. Astronomical Photometry. New York: Van Nostrand Rinhold, 1982.
Ilyas, Mohammad. A modern guide to astronomical calculations of Islamic calendar, times and qibla. Kuala Lumpur: Berita Publishing Sdn Bhd., 1984.
———. Astronomy of Islamic times for the twenty-first century. London: Mansell, 1989.
Issa, I A, dan A H Hassan. “Evening and morning twilights at Bahria/Egypt. II.” NRIAG J. Astron. Astrophys.(Special Issue), 2008, 399–411.
———. “Eye Criteria and times of end and begin of twilights. Bahria/Egypt. III.” NRIAG J. Astron. Astrophys.(Special Issue), 2008, 413–23.
———. “Transparency of the night sky at Bahria/Egypt. I.” NRIAG J. Astron. Astrophys.(Special Issue), 2008, 383–97.
Jones, H Spencer. “Tycho Brahe (1546–1601).” Nature 158, no. 4024 (1946): 856–61.
King, David. “In synchrony with the heavens: Studies in astronomical timekeeping and instrumentation in medieval Islamic civilization.” In 2. Leiden: E. J. Brill, 2005.
King, David A. Astronomy in the Service of Islam. Great Britain: Variorum, 1993.
———. Islamic mathematical astronomy. London: Variorum, 1987.
Lynds, Beverly T. “Catalogue of Dark Nebulae.” The Astrophysical Journal Supplement Series 7 (1962): 1.
McGillivray, Donald. Physics and astronomy. London: Macmillan Education LTD, 1987.
Qasmi, Moulana Yakub, dan Tariq Muneer. Prayer Times for United Kingdom & Ireland. Dewsbury: Islamic Research Institute of Britain, 1989.
Roach, F. The light of the night sky. Vol. 4. U.S.A.: Springer Science & Business Media, 1973.
Rose, J. “Galileo Galilei (1564–1642).” Nature 201, no. 4920 (1964): 653–57.
Rozenberg, Georgij V. Twilight. New York: Plenum Press, 1966.
Semeida, M A, dan A H Hassan. “Pseudo dawn and true dawn observations by naked eye in Egypt.” Beni-Suef University Journal of Basic and Applied Sciences 7, no. 3 (2018): 286–90.
Sulidar. “The Review of Some Hadiths in Praying Shubuh and Astronomy Observation.” IOSR Journal Of Humanities And Social Science (IOSR-JHSS) 22, no. 11 (2017): 40–47. doi:10.9790/0837-2211054047.
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