The Dawn Sky Brightness Observations in the Preliminary Shubuh Prayer Time Determination

Abstract

<span class="mceitemhidden"><span lang="IN">The indication of began to enter the shubuh prayer time is when emerge the morning dawn and lasted until the sun rises. The sun</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="hiddensuggestion"><span lang="IN">position</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="mceitemhidden"><span lang="IN">when emerge the morning dawn is below the intrinsic horizon marked with a minus sign (-) with the value of a certain height. The Ministry of Religious Affairs has set the sun altitudes of dawn in the shubuh prayer time with minus (-) 19°+ sunrise/sunset altitudes as standard is the reference time of dawn prayers in Indonesia. However, this provision in fact reap discourse in some quarters because it is not</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="hiddengrammarerror"><span lang="IN">in accordance with</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="mceitemhidden"><span lang="IN">the phenomenon of morning dawn emergence at the beginning of the shubuh prayer time empirically. This study aims to decide the morning dawn, as the beginning of dawn determinant</span></span><span class="mceitemhidden"><span lang="IN">.</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="mceitemhidden"><span lang="IN">The tool used in this study is the Sky Quality Meter (</span></span><span class="hiddenspellerror"><span lang="IN">SQM</span></span><span class="mceitemhidden"><span lang="IN">), to detecting the morning dawn emergence as a sign of the beginning of the shubuh prayer time. The results of this study found that the brightness of the sky throughout the night or the morning dawn in</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="hiddenspellerror"><span lang="IN">Tayu</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="mceitemhidden"><span lang="IN">Beach,</span></span><span class="apple-converted-space"><span lang="IN"> </span></span><span class="hiddenspellerror"><span lang="IN">Pati</span></span><span class="mceitemhidden"><span lang="IN">, Central Java, in the span of four days of observation that is at 4: 31 </span></span><span class="mceitemhidden"><span lang="EN-GB">a.m</span></span><span class="mceitemhidden"><span lang="IN"> with an average altitude of the sun is -17°(17°below the horizon)</span></span><span class="mceitemhidden"><span lang="IN">.</span></span>

Pengamatan Fajar Ṣādiq Menggunakan Sistem Otomatisasi Observasi Fajar Dan Sky Quality Meter Stand Alone Di Sulawesi Selatan (Studi Komparatif)

“…13 Di lokasi lain, Noor & Hamdani (2018) melakukan observasi pada periode Agustus hingga September menggunakan SQM di Pantai Tayu Pati dengan kesimpulan bahwa fajar terdeteksi ketika matahari berada pada -17°. 14 Sementara itu, selama 26 hari dari bulan Juni dan Juli 2015, dengan kembali menggunakan SQM, Saksono & Fulazzaky (2020) menyimpulkan bahwa fajar adalah terdeteksi saat Matahari berada pada -14° ± 0,6 di Depok. 15 Rohmah (2016) melakukan penelitian selama 22 hari di Juwiring, Pati, Yogyakarta (Jawa Tengah), Kaibon (Jawa Timur), dan Bandung (Jawa Barat) dengan menggunakan kamera digital.…”

The Effect of the Installation Angle of the Sky Quality Meter on the Night Sky Brightness and the Beginning of the Fajr Prayer Time

“…The beginning of Fajr prayer time is defined at the dawn of sadiq seen on the eastern horizon. The dawn sadiq is a white light visible on the east horizon and spread horizontally that appears before sunrise [9]. Dawn sadiq in astronomy is understood to be the astronomical dawn when the Sun is 18 o below the horizon, as seen in Figure 2.…”

“…Besides, this tool is also the choice of night sky brightness researchers because it is user friendly and has good aftersales service and support [7]. SQM is also used to assess the eclipse period and the beginning of the Fajr prayer time [8], [9].…”

Pengukuran Kecerahan Langit Arah Zenit di Medan dan Serdang Bedagai Menggunakan Sky Quality Meter

“…SQM dapat digunakan untuk mengukur waktu fase gerhana Bulan dan Matahari (Butar-Butar et al, 2020) (Yudhiakto Pramudya & Arkanuddin, 2016). Selain itu SQM juga dapat digunakan untuk menentukan awal waktu salat Subuh (Noor & Hamdani, 2018).…”