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Ahmad Izzuddin
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Gedung Dekanat Fakultas Syariah dan Hukum, UIN Walisongo Semarang Jl. Prof. Dr. Hamka, Tambakaji, Kec. Ngaliyan, Kota Semarang, Jawa Tengah 50185
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Al-Hilal: Journal of Islamic Astronomy
Published by Universitas Islam Negeri Walisongo Semarang
ISSN : 27751236     EISSN : 27752119     DOI : https://doi.org/10.21580/al-hilal
Core Subject : Religion, Science, Social,
Religion Astronomy Earth & Planetary Sciences Physics Social Sciences
Al-Hilal Journal is a scientific journal published in April and October per year by the Islamic Astronomy at the Faculty of Sharia and Law, Universitas Islam Negeri (UIN) Walisongo, Semarang colaboration with Asosisasi Dosen Falak Indonesia (ADFI). Articles published in this journal are the results of empirical research in Islamic Astronomy (such as qibla, salat times, Islamic Calendar, Eclipse and others), and its approaching on other area studies (mathematics, physics, astrophysics, social, politics, anthropology, ethnography and others). This journal has specifications as a medium of publication and communication of Islamic Astronomy ideas derived from theoretical and analytical studies, as well as research results in the field of both natural and social science. The editor hopes that writers, researchers and legal experts will contribute in this journal.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 2, No 2 (2020)" : 6 Documents clear
ASTRONOMICAL INTERPRETATION OF EARLY PRAYER TIMES (Study of Differences in Determination of Early Prayer Times From The Text and Astronomical Prespective) Rifki Hasan Hasan
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.484 KB) | DOI: 10.21580/al-hilal.2020.2.2.6640

Abstract

Theoretically the prayer times have been determined by the Koran and Sunnah through the phenomenon of the movement of the sun. Based on the instructions of the Koran and the Sunnah there are various nashes that seem to contradict one another. For example, in the determination of early Fajr time, nashexpresses with some terminologhy, for example, ghalas, isfar, and ishbah. This needs to be defined practically in astronomical rules, making it easier for us to carry out worship. This paper will describe the meaning of prayer times from the language of the Koran and Sunnah into astronomical rules, so that prayer times can be easily reckoned and determined, without having to change the phenomenon of the sun every time it will perform prayers. This paper will include the debate of scholars in interpreting sharia in astronomical rules, so that this paper is not only doctrinal, but invites us to think more creatively in determining prayer times.
THE JAVA CALENDAR AND ITS RELEVANCE WITH THE ISLAMIC CALENDAR Faiz Farichah
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.798 KB) | DOI: 10.21580/al-hilal.2020.2.2.6725

Abstract

Calendar or calendar system is an important reference for mankind from ancient times to the present. Judging from the reference system, there are three types of calendars, namely solar-based, lunar-based and both-based calendars. Meanwhile, in terms of its complexity, the calendar is divided into two, namely the astronomical and arithmetic calendars. The Javanese calendar after the changes made by the great sultan, was inspired by the hijri calendar. Both are based on the lunar calendar. The aim of this study is to introduce the calendar system, the Javanese calendar and its relevance to the hijriah calendar, and the Javanese Aboge calendar. This research is descriptive. The source in this research study is literature review. From this research it was found that the hijri calendar is an astronomical calendar that requires observation and has a high degree of accuracy with respect to the visibility of the new moon, while the Javanese calendar is an arithmetic calendar system, so it requires corrections in a certain period to be the same or nearly the same as the hijri calendar. However, the Aboge calendar does not change curves or cycles, so that the Aboge Javanese calendar has a difference of days with the Javanese calendar currently in use, namely the calendar with the asapon calendar, and it could be the same or the difference of up to two days with the Hijri calendar. Yet the calendar is used by the Javanese not only for worship, but also for petungan in determining traditional ceremonies and personal interests.
AYYĀM AL-BĪḌ SYAR'I AND ASTRONOMY PERSPECTIVE (BETWEEN FASTING MOMENTUM AND SCIENTIFIC CALCULATION) luayyin luayyin; M. Ihtirozun Ni'am
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (687.563 KB) | DOI: 10.21580/al-hilal.2020.2.2.6743

Abstract

Ayyām al-Bīdis a group of days in the hijri calendar system. Ayy termām al-Bīdobtained from the hadith of the Prophet which contains the command to fast for three days in each hijri month, which is sunnah. Ayy understandingām al-Bīdfrom the hadith of the Prophet is the date / day of the 13th, 14th, and 15th of the Hijri month. However, at a practical level, scholars differed when they mentioned the implementation of Ayy's fastām al-Bīd. There are 9 versions of this opinion. Here the writer wants to examine more deeply ayyām al-BīdThis is seen from a shar'i and astronomical perspective. The writer studies it with the research library method using the scientific-cum-doctriner approach. The data collected came from the books of hadith and fiqh, then analyzed with an astronomical approach. From this research, it was found that the meaning of the term Ayyām al-BīdIn the view of syar'i, it is the best time to observe the sunnah fast for three days every month. Matan hadith of the Prophet SAW regarding Ayyām al-Bīd which stipulates on the 13th, 14th and 15th of the Hijri month because that is the time when the full moon and lunar eclipses occur. From the review of astronomy Ayyām al-Bīdis the time when at night the Moon shines brighter than the other nights. Astronomically this can occur 4-5 days in the middle of the Hijri month. 
THE DETERMINATION OF BEGINNING OF PASAH ANDTELLASAN AT AL-KARAWI ISLAMIC BOARDING SCHOOL OF SUMENEP REGENCY Fathor Rausi
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.293 KB) | DOI: 10.21580/al-hilal.2020.2.2.7979

Abstract

The determination of beginning of Pasah and Tellasan in Al-Karawi Islamic Boarding Schools is often different from the decisions of the government (Ministry of Religion of the Republic of Indonesia) or Islamic society organizations, such as Nahdlatul Ulama or Muhammadiyah. Al-Karawi Islamic Boarding School uses the calculating method compiled by one of the boarding school educators in determining the beginning of fasting and Eid. This research is intended to analyze the phenomenon of early fasting and Eid froma sociological perspective. These problems are discussed with field research through the socio legal studies approach. The results of this study indicate that the beginning determination of fasting and Eid Al-Karawi Islamic Boarding School is often different from the government is due to the strong patronage relationship among kiai, santri and the residents of Karawi village.
SOLAR EPHEMERIS ACCORDING TO SIMON NEWCOMB Alamul Yaqin
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.356 KB) | DOI: 10.21580/al-hilal.2020.2.2.6724

Abstract

The development of Falak cannot be separated from the ephemeris table, one of them i.e Simon Newcomb solar ephemeris. This ephemeris was used in the initial calculation of Abdur Rachim, one of Falak Indonesia's experts. The purpose of this study was to determine the accuracy of the Simon Newcomb ephemeris reckoning algorithm and its strengths and weaknesses. This paper use descriptive analysis as the research methodology. The results of this study are this Ephemeris is quite accurate because because there aremany correction terms and consider aspects of the planet's relative motion to the Earth that can be seen in the formula for perturbation and nutation correction. The advantage of this ephemeris,it has a long period correction which is useful for calculating the Sun ephemeris in years far enough from the epoch used and directly uses UT time in its calculations so there is no need to convert UT to TD. The weakness of this ephemeris is that it cannot be done manually because the formula used is too long and there are many formula corrections.
QIBLA DIRECTION WITH THE CONSTELLATION (STUDY OF DETERMINATION OF QIBLA DIRECTION WITH GUBUG PENCENG) M Ihtirozun Ni'am; Muhammad Fiki Burhanuddin; Nizma Nur Rahmi
Al-Hilal: Journal of Islamic Astronomy Vol 2, No 2 (2020)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.608 KB) | DOI: 10.21580/al-hilal.2020.2.2.7964

Abstract

In the ethnography of Javanese society, Gubug penceng is used as a southern constellation. With a declination value of -63º 05’ 57”, the appearance of this gubug penceng is a bit unique, because it can only be observed by observers who are south of the tropic. However, with a magnitude value of 0.77 and a shape that is easy to remember, it makes the gubug becomes a star that is easily visible to the naked eye. The author here will examine the use of the gubug penceng for determining the direction of the Qibla. Previous writers will take into account the azimuth of the Qibla and the azimuth of the acrux star which is the brightest star in the constellation of the thinner, then determine the direction of the Qibla by referring to the difference between the azimuth acrux and the qibla. This research is a field research which is included in qualitative numerical research. The author will compare the results of the Qibla direction from this gubug penceng with the Qibla direction determined with the help of the azimuth of the Sun. The results of this study found that the gubug penceng can be used as a reference to determine the direction of the Qibla. The qibla direction of the measurement results is quite accurate, because the object of aiming is in the form of a central point of the star. The difference between the direction of the Qibla between using the reference hut is not more than 24 minutes, so the results are quite accurate.

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