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All Journal Jurnal Riset dan Kajian Pendidikan Fisika YUDISIA : Jurnal Pemikiran Hukum dan Hukum Islam JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) SPEKTRA: Jurnal Kajian Pendidikan Sains Jurnal Environmental Science MUST: Journal of Mathematics Education, Science and Technology Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Jurnal SOLMA ORBITA: Jurnal Pendidikan dan Ilmu Fisika Jurnal Dinamika Sosial Budaya Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan Journal of Islam and Science Jurnal Ilmu Pemerintahan, Administrasi Publik, dan Ilmu Komunikasi (JIPIKOM) ELFALAKY: Jurnal Ilmu Falak Proceeding International Seminar of Islamic Studies Al-Hilal: Journal of Islamic Astronomy Al-Afaq: Jurnal Ilmu Falak dan Astronomi DIKTUM: JURNAL SYARIAH DAN HUKUM Astroislamica: Journal of Islamic Astronomy Jurnal Ilmu dan Inovasi Fisika Wahana Fisika : Jurnal Fisika dan Terapannya Al-Ahkam: Jurnal Ilmu Syari'ah dan Hukum JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Hariyadi Putraga
Universitas Muhammadiyah Sumatera Utara
Religion Arts Humanities Astronomy Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Model Komunikasi Sains OIF UMSU dalam Pelatihan Ilmu Falak di Vihara Vimalakirti Sinaga, Roynanda; Rakhmadi, Arwin Juli; Putraga, Hariyadi; Andika, Muhammad Sadam; Thariq, Muhammad
Jurnal Ilmu Pemerintahan, Administrasi Publik, dan Ilmu Komunikasi (JIPIKOM) Vol 7, No 2 (2025): JIPIKOM OKTOBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jipikom.v7i2.6239

Abstract

Penelitian ini menganalisis model komunikasi sains yang diterapkan oleh Observatorium Ilmu Falak Universitas Muhammadiyah Sumatera Utara (OIF UMSU) dalam pelatihan Ilmu Falak di Vihara Vimalakirti, Medan. Kegiatan ini melibatkan anak-anak usia TK dan SD dari komunitas Buddhis beserta orang tua mereka. Menggunakan pendekatan kualitatif dan wawancara semi-terstruktur, penelitian ini mengidentifikasi penerapan empat model komunikasi sains: defisit, dialog, partisipatif, dan kontekstual. Model defisit berfungsi sebagai fondasi pengetahuan awal, sedangkan model dialog dan partisipatif mendorong keterlibatan peserta melalui diskusi dan eksperimen seperti peluncuran roket air dan pengamatan Matahari. Model kontekstual tampak dari penyesuaian kegiatan terhadap budaya dan agama peserta serta kerja sama lintas institusi. Hasil penelitian menunjukkan bahwa pendekatan komunikasi sains yang inklusif dan berbasis nilai toleransi efektif dalam meningkatkan literasi sains dan membangun ruang dialog antaragama. Studi ini menawarkan model edukasi sains transformatif bagi masyarakat majemuk.
ANALISIS DAMPAK POLUSI CAHAYA LAMPU ARTIFISIAL TERHADAP KECERLANGAN LANGIT MALAM MENGGUNAKAN SKY QUALITY METER (Studi Kasus Barus-Sumatera Utara): Studi Kasus Barus-Sumatera Utara Firdaus, Muhammad Dimas; Butar-Butar, Arwin Juli Rakhmadi; Putraga, Hariyadi; Hidayat, Muhammad
ELFALAKY: Jurnal Ilmu Falak Vol 6 No 2 (2022): Desember
Publisher : UIN ALAUDDIN MAKASSAR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/ifk.v6i2.33787

Abstract

The brightness of the night sky is a necessity in astronomical observations. Sky with minimal light pollution can be optimized for observation and research. Light pollution is an obstacle in astronomical observations, one of the light pollution that affects the night sky a lot is artificial lights that are not properly conditioned. In this study, it is explained how the impact of artificial lights on good sky brightness using the Sky Quality Meter (SQM). By observing several nights, it was found that locations with a lot of light exposure can make the sky brighter ~3.3 times compared to locations with minimal light.
Pengamatan Hilal Siang Hari di OIF Cabang Barus Muhammad Dimas Firdaus; Hariyadi Putraga; Muhammad Hidayat; Arwin Juli Rakhmadi
Astroislamica: Journal of Islamic Astronomy Vol. 1 No. 2 (2022): Astroislamica: Journal of Islamic Astronomy (Desember)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.937 KB) | DOI: 10.47766/astroislamica.v1i2.965

Abstract

Crescent observation as one of the practices carried out within the scope of falak science has an escalation in methods to adapt the development of science and technology. The development of crescent observation method has an impact on the observation time. In the past, observing crescent only focused when the sun had set, but now observing crescent can be done since the sun is still above the horizon. OIF UMSU as an institution engaged in the field of falak science also conducts crescent observations every month from noon. On November 25, 2022, OIF Barus Team managed to capture the new moon crescent at noon at 13:49 WIB with an elongation of 18°25'. This observation could maximizing existing instruments to obtain crescent images with smaller elongation.
Problematika Penentuan Hari Tarwiyah dan Arafah dalam Perspektif Ilmu Falak Marataon Ritonga; Arwin Juli Rakhmadi; Hariyadi Putraga; Muhammad Hidayat
Astroislamica: Journal of Islamic Astronomy Vol. 2 No. 1 (2023): Astroislamica: Journal of Islamic Astronomy (Juni)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47766/astroislamica.v2i1.1093

Abstract

For a long time, Muslims were facing problems related to the determination of the Tarwiyah and the Arafat fasting day. In this case, whether Muslims should follow the Saudi Arabian calendar or the local one. In this study, Muslims differ in opinion, some argue that they should follow the Saudi Arabia calendar and others say that enough to follow the national calendar. The absence of unified calendar resulted in many problems faced by Muslims in assigning their holidays such as Ramadan, Shawwal, and Dhulhijah. To achieve Muslim unification in conducting various religious rituals, Muslims must have a unification dating system in order to realize togetherness in determining the worshipping time. This research is literature research. Thus the data that used in the form of books, journals, and other references. The results concluded that the determination of Tarwiyah and f Arafat Day until now still provides dispute among Muslims, there are those who argue specifically in determining the Dhulhijah beginning must be oriented to the Saudi Arabia kingdom’s determination. While others argue that assigning the worshipping time does not have to follow Saudi Arabia, just adhering to the nation’s determination
Perbandingan Medan Pandang Teleskop dalam Pengamatan Konjungsi Bulan – Jupiter dari Kota Medan, Barus, dan Lhokseumawe Hariyadi Putraga; Muhammad Dimas Firdaus; Marataon Ritonga; Arwin Juli Rakhmadi; Ruslandi Ruslandi; Ismail Ismail
Astroislamica: Journal of Islamic Astronomy Vol. 3 No. 1 (2024): Astroislamica: Journal of Islamic Astronomy (Juni)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47766/astroislamica.v3i1.2816

Abstract

Astronomical phenomenon occur for only a limited amount of time. Observing these phenomenon requires competent promoters and appropriate instruments. The field of view is one of the things that needs to be clearly known so that the observation can take place properly. In this study, joint observations were made between IAIN Lhokseumawe Falak Science Study Programme and OIF UMSU in Medan and Barus. The instruments used in these observations are different, resulting in a variety of fields of view and calculations are needed to get a description of the results. This study aims to calculate the field of view and visibility of the observed phenomenon, the conjunction of the Moon - Jupiter. The results obtained are for the instrument used by IAIN Lhokseumawe Falak Science Study Program at Malikussaleh Observatory has a field of view of 2°7'46.13‘ × 1°25'22.25’, the instrument used by UMSU Medan Falak Science Observatory has a field of view of 1°8'26.96‘ × 0°54'45.57’, and the instrument used by the OIF UMSU Barus team has a field of view of 1°0'43.74’ × 0°41'1.98. Using this combination of instruments cannot observe the conjunction phenomenon, because the elongation of the Moon - Jupiter at the time of the observation is >4°, so to be able to get the visibility of the phenomenon in 1 image requires an instrument that produces a field of view of ~5°.
Transformasi Hisab-Rukyat Dalam Penentuan Awal Bulan Hijriah di Muhammadiyah Ritonga, Marataon; Rakhmadi, Arwin Juli; Hidayat, Muhammad; Putraga, Hariyadi
Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan Vol. 21 No. 1 (2024): Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan (AJAIP)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/al-hikmah:jaip.2024.vol21(1).14676

Abstract

Muhammadiyah as a tajdid (renewal) movement will continue to improve the system in determining the beginning of hijri month through studies, discussions seminars, and research so that the methods and criteria used are truly following the Qur’an, hadith and the Muslims needs in the world. This research purpose to analyze, explore, and discover the transformation and changes in methods made by Muhammadiyah to determine the new month. The research method in this study is a literature study, by conducting a study and book analysis, journals, Suara Muhammadiyah magazines, and related references that have a close relationship with the studies. Based on the study, it shows that Muhammadiyah has made several transformations in its ijtihad to determine the beginning of the new hijri month, starting from the hisab imkanur rukyat sytem, then replaced with the hisab ijtima’ qabl al-ghurub, and the last one was perfected with the hisab wujudul hilal.
The Sun's Vertical Depression Effect on True Dawn: A Visual Observation Study Hariyadi Putraga; Arwin Juli Rakhmadi; Ahmad Abdulwfa
Astroislamica: Journal of Islamic Astronomy Vol. 5 No. 1 (2026): Astroislamica: Journal of Islamic Astronomy (June)
Publisher : Islamic Astronomy Department, Sharia and Law Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47766/astroislamica.v5i1.7573

Abstract

This study aims to analyze the influence of the Sun's vertical depth on the appearance of true Dawn in Medan City using the naked-eye observation method. Observations in Medan show that the true dawn light first appears when the Sun is at a depression angle of −14° to −12° below the eastern horizon. The difference between the visible true Dawn and the official dawn time (-20°) is about 6°. These results are consistent with more than 30 studies conducted across over 10 countries at various latitudes, utilizing approximately five different monitoring methods. These results confirm the need to correct the dawn time based on local observations and actual sky conditions, so that the determination of the time of worship better aligns with astronomical reality.
Pengukuran Kecerahan Langit Malam dan Polusi Cahaya di Provinsi Sumatera Utara Putraga, Hariyadi; Rakhmadi, Arwin Juli; Firdaus, Muhammad Dimas; Hidayat, Muhammad
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v7i0.71953

Abstract

Abstract: The astronomical phenomenon that occurs at a certain time and duration becomes objects for study and research. However, not every location provides the astronomical phenomenon visibility that observers want. To achieve the best data, the best observer position is also needed. During the author’s experience pursuing astronomical phenomena around North Sumatra, only a few places provide good visibility. This is related to the night sky brightness level and light pollution of the location. The night sky brightness is a variable that needed to be included to determine the location used for astronomical observation points so the observers could get the best results. The measurement was taken using a photometer named Sky Quality Meter in several locations around North Sumatra to find the best sky brightness data value reading. From the measurements, the maximum reading results for the East coast of North Sumatra is 19.39 MPSAS, for mid-North Sumatra 20.92 MPSAS, and for the West coast was 21.87 MPSAS. The location with the best night sky brightness quality and the lowest light pollution is the West coast of North Sumatra.Abstrak: Fenomena astronomi yang terjadi pada waktu dan durasi tertentu menjadi salah satu objek kajian dan penelitian. Namun, tidak semua lokasi memberikan keterlihatan fenomena astronomi seperti yang diinginkan pengamat. Untuk mendapatkan data dengan kualitas terbaik, diperlukan pula lokasi pengamat terbaik. Dalam perjalanan penulis mengejar fenomena astronomi di sekitar Sumatera Utara, hanya beberapa tempat saja yang memberikan hasil keterlihatan dengan baik. Hal ini terkait dengan tingkat kecerahan langit malam dan tingkat polusi cahaya di lokasi tersebut. Kecerahan langit malam merupakan salah satu variabel yang perlu dimasukkan dalam penentuan lokasi pengamatan astronomi agar pengamat bisa mendapatkan hasil terbaik. Pengukuran yang dilakukan menggunakan sebuah fotometer yaitu Sky Quality Meter di beberapa lokasi untuk mendapatkan data kecerahan langit malam di sekitar Sumatera Utara. Dari pengukuran yang dilakukan, didapatkan hasil maksimal untuk pesisir timur Sumatera Utara adalah 19,39 MPSAS, pertengahan Sumatera Utara adalah 20,92 MPSAS, dan untuk pesisir Barat adalah 21,87 MPSAS. Maka lokasi dengan kualitas kecerahan langit malam terbaik dan polusi cahaya paling rendah berada sekitar pesisir Barat Sumatera Utara.
Co-Authors Abu Yazid Raisal Ahmad Abdulwfa Ajraini Nazli Ajraini Nazli Andika, Muhammad Sadam Arwin Juli Rakhmadi Firdaus, Muhammad Dimas Hasrian Rudi Setiawan Hidayat, Muhammad Ismail Ismail Isra Hayati Leo Hermawan Marataon Ritonga Muhammad Dimas Firdaus Muhammad Dimas Firdaus Muhammad Hidayat Muhammad Qorib Nasution, Makromatul afifah Nor Azam bin Mat Noor Panjaitan, Nur Nilam Sary Riskiyan Hadi Rizkiyan Hadi Ruslandi Ruslandi Sinaga, Roynanda Thariq, Muhammad