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All Journal Ulul Albab: Jurnal Studi dan Penelitian Hukum Islam Afkaruna: Indonesian Interdisciplinary Journal of Islamic Studies Intiqad: Jurnal Agama dan Pendidikan Islam YUDISIA : Jurnal Pemikiran Hukum dan Hukum Islam Heritage of Nusantara: International Journal of Religious Literature and Heritage KARSA: Jurnal Sosial dan Budaya Keislaman (Journal of Social and Islamic Culture) MIQOT: Jurnal Ilmu-ilmu Keislaman Al-Ahkam: Jurnal Ilmu Syari'ah dan Hukum MAHKAMAH: Jurnal Kajian Hukum Islam JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Titian Ilmu: Jurnal Ilmiah Multi Sciences SPEKTRA: Jurnal Kajian Pendidikan Sains Jurnal Environmental Science MUST: Journal of Mathematics Education, Science and Technology Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Jurnal Pendidikan Islam Jurnal SOLMA Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan ORBITA: Jurnal Pendidikan dan Ilmu Fisika Jurnal Dinamika Sosial Budaya Journal of Contemporary Islam and Muslim Societies Idrak: Journal of Islamic Education Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan IJISH (International Journal of Islamic Studies and Humanities) Jurnal Kumparan Fisika Journal of Islam and Science Indonesian Review of Physics (IRiP) Ihsan: Jurnal Pengabdian Masyarakat Jurnal Ilmu Pemerintahan, Administrasi Publik, dan Ilmu Komunikasi (JIPIKOM) ELFALAKY: Jurnal Ilmu Falak Maslahah: Jurnal Pengabdian Masyarakat Al-Fikru: Jurnal Ilmiah International Journal of Community Service Proceeding International Seminar of Islamic Studies Al-Hilal: Journal of Islamic Astronomy Al-Afaq: Jurnal Ilmu Falak dan Astronomi Tsaqila Jurnal Pendidikan dan Teknologi Edu Society: Jurnal Pendidikan, Ilmu Sosial dan Pengabdian Kepada Masyarakat Jumantara: Jurnal Manuskrip Nusantara INJURITY: Journal of Interdisciplinary Studies DIKTUM: JURNAL SYARIAH DAN HUKUM Astroislamica: Journal of Islamic Astronomy QANUN: Journal of Islamic Laws and Studies Heritage of Nusantara: International Journal of Religious Literature and Heritage Jurnal Ilmu dan Inovasi Fisika Jurnal Pendidikan Islam Wahana Fisika : Jurnal Fisika dan Terapannya Azkayra: Jurnal Pengabdian Masyarakat dan Sosial Al-Ahkam: Jurnal Ilmu Syari'ah dan Hukum JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Arwin Juli Rakhmadi
Universitas Muhammadiyah Sumatera Utara
Religion Arts Humanities Astronomy Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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THE STUDY OF ARABIC CONSTELLATION FROM THE BOOK SUWAR AL-KAWAKIB AL-THABITA USING STELLARIUM SOFTWARE Putraga, Hariyadi; Butar-Butar, Arwin Juli Rakhmadi; Hidayat, Muhammad; Firdaus, Muhammad Dimas
Journal of Islam and Science Vol 9 No 2 (2022): July-December
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jis.v9i2.31526

Abstract

The constellations originating from Arab civilization were still very little known and studied. Al-Ṣūfi's book, al-Kawākib al-Thābitah, contains the record of coordinates, approximate magnitudes, and star details with graphs. This study examines the difference of stars in the sample constellation, compares the visual appearance of the illustrations on the Stellarium software, and studies the differences between the western constellations and the Arabic constellations. The result shows some differences between the constellations of the almagest and al-Kawākib al-Thābitah in the number of stars in the sample constellations, differences in illustrations from the orientalized figures, and the star magnitude in al-Ṣūfi's work that similar to Ptolemy's works. Al-Sufi identified a total of 134 additional stars, 65 stars located in the Northern constellations, 41 stars in the Zodiac constellation, and 28 stars in the Southern constellations. His observations showed that the magnitude values of 520 stars out of a total of 1022 stars were identical between al-Sufi and Ptolemy. Stellarium provides an excellent visual presentation of the Arabic constellations according to Al-Sufi's book that shows position, illustration, and mapping in the night sky.
Perbandingan Perhitungan Waktu Shalat Menggunakan Astrolabe RHI dan Accurate Times Hasrian Rudi Setiawan; Arwin Juli Rakhmadi; Muhammad Hidayat; Abu Yazid Raisal; Hariyadi Putraga
Al-Ahkam: Jurnal Ilmu Syari’ah dan Hukum Vol. 6 No. 2 (2021): Al-Ahkam: Jurnal Ilmu Syari'ah dan Hukum
Publisher : Fakultas Syariah, Universitas Islam Negeri Raden Mas Said Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22515/alahkam.v6i2.3416

Abstract

This study aims to determine the comparison of the calculation of prayer times using the RHI Astrolabe and Accurate Times Software. In addition, this study also describes in detail the steps in determining prayer times using the RHI Astrolabe and Accurate Times Software. The research method used in this study is experimental. The results of this study indicate that there is a difference in the calculation of prayer times on December 20 between the RHI Astrolabe and Accurate Times Software. The difference between Asr is 8 minutes, Isha 6 minutes and Fajr 1 minute. Meanwhile, during Zuhr, Maghrib and Shuruq there is no difference in the calculation of the RHI Astrolabe with the Accurate Times Software.   Penelitian ini bertujuan untuk mengetahui perbandingan perhitungan waktu shalat menggunakan Astrolabe RHI dan Software Accurate Times. Tujuan penelitian lainnya adalah untuk menjelaskan secara rinci langkah-langkah dalam menentukan waktu shalat menggunakan Astrolabe RHI dan Software Accurate Times. Adapun metode penelitian yang digunakan dalam penelitian ini yaitu eksperimen. Hasil penelitian ini menunjukkan bahwa terdapat selisih perbedaan perhitungan waktu shalat pada tanggal 20 Desember antara Astrolabe RHI dengan Software Accurate Times. Adapun selisih pada waktu Ashar 8 menit, Isya 6 menit dan Subuh 1 menit. Sedangkan waktu Zuhur, Maghrib dan Syuruq tidak ada perbedaan pada perhitungan menggunakan Astrolabe RHI dan Software Accurate Times.
SHADIQ DAWN OBSERVATION USING ALL SKY CAMERA IN DELI SERDANG, NORTH SUMATERA Ritonga, Marataon; Rakhmadi, Arwin Juli; Qorib, Muhammad; Putraga, Hariyadi
ELFALAKY: Jurnal Ilmu Falak Vol 8 No 2 (2024): Desember
Publisher : UIN ALAUDDIN MAKASSAR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/ifk.v8i2.49707

Abstract

Technological advancements in optics and digital image recorders as means were breakthroughs in capturing and observing Shadiq Fajr's appearance which produce images according to visual as seen by the eye in the field. Digital camera usage such as the All-Sky Camera which is adjustable in taking dawn data according to a certain time, could show the sky conditions from dark to light, thus providing real evidence of the shadiq fajr appearance. Based on the research conducted, there are differences in Fajr prayer times based on the results of the observations by the All-Sky Camera with processed images using ImageJ and the Fajr prayer schedule issued by the Ministry of Religion of the Republic of Indonesia. Based on the image produced by ASC and processed using imagej, it shows that there is a change in the sky from dark to bright time which is characterized by significant graphic changes continuously. The study results obtained the average of the Sun depth at the Shadiq Fajr appearance is the altitude of 13.75 degrees below the horizon.
Hilal Observation using LRGB Filters Firdaus, Muhammad Dimas; Putraga, Hariyadi; Ritonga, Marataon; Rakhmadi, Arwin Juli
AL - AFAQ : Jurnal Ilmu Falak dan Astronomi Vol. 6 No. 2 (2024): Desember 2024
Publisher : Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/afaq.v6i2.10928

Abstract

The technology used in hilal observation continues to develop. Most recently, using filters has become one of the options in hilal observation. Several filters can be used, ranging from low wavelengths like ultraviolet to high wavelengths like infrared. In some ideas, there needs to be a limit to the use of filters, the human eye's ability as a benchmark for the filter used. The human eye is sensitive to light with visual wavelengths, and one type of filter in this range is the LRGB filter. In this study, hilal observations were made on four filters and compared to find out which filter is better at increasing the contrast of hilal against the background. Using Michelson and Weber contrast as the definition of contrast to determine the comparison of the brightness value of the object with the background.  From the observations made, it is found that the R filter will produce higher contrast values at low altitudes, followed by the L, G, and B filters. However, at higher altitudes, the contrast values of the L and R filters are similar, while the G and B filters remain low.
The Spirit of Tolerance in Determining the Time of Dawn According to Indonesian Classical Scholars in Malay-Nusantara Qorib, Muhammad; Juli Rakhmadi, Arwin
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 3 No. 1 (2024): INJURITY: Journal of Interdisciplinary Studies.
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v3i1.161

Abstract

This study traces the spirit of tolerance of 5 Malay-Nusantara scholars about conception or early standards of dawn (Subuh). The five figures are Ahmad Khatib Minangkabau (d. 1334 H/1915 AD), Muhammad Mukhtar bin 'Atharid Bogor (d. 1349 H/1930 AD), Hasan bin Yahya Jambi (d. 1940 AD), and Muhammad Thahir Jalaluddin (d. 1376 H/1956 AD). Of the 5 figures, four of them set the standard of the beginning of Subuh time 19 degrees, while one figure namely Sheikh Muhammad Thahir Jalaluddin set 20 degrees. This 20-degree standard is commonly used by Muslims in the Southeast Asian region today. Eventhough they disagreed in some aspects, but they aprreciated the different methods they used, but they had the same goal
Pengukuran Kecerahan Langit Arah Zenit di Medan dan Serdang Bedagai Menggunakan Sky Quality Meter Raisal, Abu Yazid; Putraga, Hariyadi; Hidayat, Muhammad; Rakhmadi, Arwin Juli
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 5 No. 1 (2021): May Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v5i1.835

Abstract

Light pollution is a worldwide problem that affects fewer stars that can be seen at night. This study aims to measure the brightness of the sky in the zenith direction to minimize the effect of light pollution in observing celestial bodies. The research used the observation method of sky brightness level with SQM. Measurement of sky brightness was carried out in two places, namely in Medan and Serdang Bedagai. The SQM is mounted in a zenith direction and set to retrieve data every two seconds. Observations were made on November 10-13, 2018, during the new moon phase. The average value of sky brightness obtained in Medan is 18.05 mpsas and the NELM value is 4.00. Based on the Bortle scale, Medan is included in the ninth class area, namely the inner-city sky. Meanwhile, the average value of sky brightness obtained in Serdang Bedagai is 19.69 mpsas and the NELM value is 5.26. Based on the Bortle scale, Serdang Bedagai belongs to the sixth class area, namely bright suburban sky.
Religious Learning Using The Sing A Song Method At The Sungai Buloh Guidance Center, Kuala Lumpur Robie, Fanreza; Ginting, Nurman; Juli Rakhmadi, Arwin; Pradesyah, Riyan
International Journal Of Community Service Vol. 3 No. 3 (2023): August 2023 (Indonesia - Malaysia - Philippines - South Korea )
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v3i3.198

Abstract

Based on the results of observations and preliminary studies, it was found that students' ability to understand religious subjects at the Sungai Buloh Guidance Studio, Kuala Lumpur, was still low, this was evidenced by the process and learning outcomes. This activity is usually held once a week at the Sungai Buloh Guidance Studio. In the activity of conveying religious learning material, there were educators who delivered religious subjects using non-cooperative methods. It was found that when students received religious subject matter, there was a delay. Then there has been no maximum effort to use the cooperative method to increase students' understanding of religious subject matter by educators. The solution offered to the Sungai Buloh Guidance Center is to provide training to educators using the Sing A Song Method in delivering religious subject matter to students. The Sing A Song method is a way of teaching and introducing religious subject matter with a singing method that uses certain lyrics that are sung. Usually the lyrics of the songs are adjusted to the subject matter that will be taught to students which is done repeatedly in this training. Initially, educators were given the opportunity to make song lyrics adapted to the subject matter and then also adapted to the tunes of songs that were easy for students to memorize. Then educators practice how to deliver and teach directly to students, and later will be accompanied by mentors provided. After that an evaluation was carried out, by means of which the participants read one verse of the Koran, so that they could find out the level of understanding that had been achieved.
Frequency-Based Analysis of Mosque Qibla Errors in Medan Rakhmadi, Arwin Juli; Putraga, Hariyadi; Ritonga, Marataon; Ismail, Ismail
Al-Hilal: Journal of Islamic Astronomy Vol. 7 No. 1 (2025)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/al-hilal.2025.7.1.24203

Abstract

Mosque plays a vital role in supporting the performance of prayer comfortably and solemnly. However, one of the most crucial elements in mosque construction is the accuracy of the qibla direction facing the Kaaba. In cities far from the Kaaba, such as Medan, determining the qibla direction cannot be done visually and requires precise astronomical calculations and technical approaches. The problem that arises is the continued presence of mosques with qibla directions deviating from the correct orientation, which can affect the quality of worship for Muslims. This study uses a specially reduced mosque Qibla measurement sample data in Medan city. This paper analyzes data from 38 mosque samples with Qibla direction errors, which were re-measured by the UMSU OIF team. The data were then processed using a frequency distribution method to provide an overview of the error distribution in mosque Qibla directions across the city of Medan. This study found that the error often seen is a deviation of 9-12 degrees from the Qibla direction, and the mistake factors. This study also found that the misalignment of Qibla directions in Medan is mainly due to prioritizing land efficiency over directional accuracy during mosque construction, as well as relying on general assumptions and previously heard fatwas rather than precise astronomical calculations.
Effectiveness Test of iOptron Cube-G Telescope for Hilal Observation Firdaus, Muhammad Dimas; Putraga, Hariyadi; Butar-Butar, Arwin Juli Rakhmadi; Hidayat, Muhammad
AL - AFAQ : Jurnal Ilmu Falak dan Astronomi Vol. 4 No. 2 (2022): Desember 2022
Publisher : Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/afaq.v4i2.5341

Abstract

The use of robotic telescopes in the practice of observing the Hilal in Indonesia is quite widespread. One type of telescope that is widely used by observers is the iOptron Cube. Telescopes with an alt-azimuth mounting type with GPS features can be used easily by observers who observes Hilal on a portable basis. The effectiveness of using this telescope needs to be studied more deeply because pointing accuracy and alt-azimuth tracking mounting capabilities require good computational ability to obtain the expected results. After being tested with two configurations (narrow and wide field of view) and seeing the various supporting features embedded in this telescope, it can be concluded that the iOptron Cube is quite effective for observing Hilal.
Analisis Peningkatan Polusi Cahaya Berdasarkan Pembacaan SQM dan Citra Satelit VIIRS tahun 2017 – 2022 di Kota Medan Putraga, Hariyadi; Raisal, Abu Yazid; Firdaus, Muhammad Dimas; Rakhmadi, Arwin Juli
AL - AFAQ : Jurnal Ilmu Falak dan Astronomi Vol. 5 No. 1 (2023): Juni 2023
Publisher : Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/afaq.v5i1.7250

Abstract

An analysis of light pollution has been carried out based on the reading of a photometercalled Sky Quality Meter (SQM) which shows the level of light pollution expressed in the MPASSreference. This study aims to determine the increase in light pollution in the city of Medan and to findout the implications for astronomical observations there. Light pollution distribution maps data andradiance quantity data are obtained through a platform that presents light pollution mapping and isfurther analyzed with literacy studies. Its Found that the radiance value is proportional to the level ofpollution and is influenced by the population of civilization in Medan from 2017 to 2022 soastronomical observations and phenomena are also decreasing to be visible.
Co-Authors Abu Yazid Raisal Ajraini Nazli Ajraini Nazli Amrizal Amrizal Amrizal Amrizal Andika, Muhammad Sadam Cemda, Abdul Rahman Fanreza, Robie Firdaus, Muhammad Dimas Ginting, Nurman Gunawan Gunawan Habibullah Ritonga Hariyadi Putraga Hasrian Rudi Setiawan Hermawan, Leo Hidayat, Muhammad Ida Hanifah Ismail Ismail Ismail Ismail Isra Hayati Khair, Alfath Leo Hermawan Marataon Ritonga Marataon Ritonga Mario Kasduri Muhammad Dimas Firdaus Muhammad Dimas Firdaus Muhammad Dimas Firdaus Muhammad Hidayat Muhammad Hidayat Muhammad Qorib Munawir Pasaribu Nasution, Makromatul afifah Nor Azam bin Mat Noor Panjaitan, Nur Nilam Sary Pradesyah, Riyan Radiman Radiman Radiman, Radiman Rangkuti, Ahmad Zuhri Riskiyan Hadi Robby Pamungkas Robie, Fanreza Ruslandi Ruslandi Sinaga, Roynanda Thariq, Muhammad Zailani Zailani Zailani Zailani Zebua, Marfirah Syam