Contemporary Haqiqī Calculation: Analysis of Rinto Anugraha's Lunar Eclipse Calculation Methods

'Alamul Yaqin

doi:10.24260/jil.v3i1.531

'Alamul Yaqin Institut Agama Islam Negeri Pekalongan, Indonesia https://orcid.org/0000-0002-3244-9000

DOI: https://doi.org/10.24260/jil.v3i1.531

Abstract

Classical Islamic astronomy literature that discusses eclipse calculations still uses the ḥaqiqī bi al-taqrīb method with low accuracy. In its development, Islamic astronomical literature studies the calculation of lunar eclipses with high accuracy, including Mekanika Benda Langit work by Rinto Anugraha. This article aims to analyze the calculation method and accuracy of the Rinto Anugraha lunar eclipse and compare it with Jean Meeus, Bao Lin Liu, and Alan D. Fiala's calculations NASA (National Aeronautics and Space Administration). Using bibliographic research and descriptive-comparative methods, the author finds that the method of calculating the lunar eclipse of Rinto Anugraha is contemporary haqiqī. The calculation of the lunar eclipse proposed by Rinto Anugraha is based on Jean Meeus' lunar eclipse calculation, and slight modifications are using NASA data. Rinto Anugraha's lunar eclipse calculation has a high level of accuracy because it has the most significant average difference of 3 minutes 36 seconds in the penumbral eclipse begins stage with the results of the lunar eclipse calculations from Jean Meeus, Bao Lin Liu and Alan D. Fiala, and NASA. Anugraha's contemporary calculation method has implications for simplifying the lunar eclipse calculation formula and the range of lunar eclipses that can be calculated further.

References

Al-Aṩqalani, Al-Imām al-Ḥāfiẓ ibnu Hajar. Fatḥ al-Bāri. Jakarta: Pustaka Azzam, 2011.

Amalia, Rizka, and Titin Suprihatin. "Tinjauan Ilmu Falak Terkait Fenomena Gerhana Bulan Penumbara terhadap Kebijakan Salat Gerhana pada Ormas Islam." Jurnal Riset Hukum Keluarga Islam 1, no. 2 (2021): 60. https://doi.org/10.29313/jrhki.v1i2.430.

Amir, Rahma. "Metodologi Perumusan Awal Bulan Kamariyah di Indonesia.” EL-FALAKY 1, no. 1 (2017): 100. https://doi.org/10.24252/ifk.v1i1.6434.

Anugraha, Rinto. Mekanika Benda Langit. Yogyakarta: Jurusan Fisika FMIPA UGM, 2012.

__________. “Saya”, n.d., https://rintoanugraha.staff.ugm.ac.id/saya/.

Azmi, Muhammad Farid, Ahmad Adib Rofiuddin, and Ahmad Ainul Yaqin. "Prediksi Pergerakan Bayangan Bumi Saat Terjadi Gerhana Bulan Menggunakan Ephemeris Hisab Rukyat." Al-Marshad 4, no.2 (2018): 202. http://dx.doi.org/10.30596%2Fjam.v4i2.21402.

Bagdoo, Russell. "Lunar Eclipses and Allais Effect." Journal of Modern Physic 12, (2021): 1784-1785. https://doi.org/10.4236/jmp.2021.1213104.

Espenak, Fred. "Diameters and Lunar Eclipses," n.d.. https://eclipse.gsfc.nasa.gov/OH/OH2007.html#Shadow.

Freeth, Tony. "Eclipse Prediction on the Ancient Greek Astronomical Calculating Machine Known as the Antikythera Mechanism." Plos One 9, no. 7 (2014): 1, https://doi.org/10.1371/journal.pone.0103275.

Interview report with Rinto Anugraha on August 1, 2016.

Hidayat, Ehsan. “Penentuan Jumlah Gerhana Matahari dengan Argumen Lintang Bulan dan Teori Aritmetika.” 15, no. 1 (2020): 62–93. http://dx.doi.org/10.33754/miyah.v15i01.166.g135.

Izzuddin, Ahmad. Metode Hisab-Rukyat Praktis dan Solusi Permasalahannya. Semarang: Pustaka Rizki Putra, 2012.

__________. Pemikiran Hisab Rukyah Abdul Jalil. Penelitian Individual IAIN Walisongo Semarang, 2005.

Jeon, Junhyeok, and Seulki Kim. "A Study on the Accuracy of Predicted Solar and Lunar Eclipses for Seoul and Beijing by Qing China Astronomers between 1721 and 1881." Advances in Space Research, 66. (2020): 1. https://doi.org/10.1016/j.asr.2020.07.019.

Khazin, Muhyiddin. Ilmu Falak dalam Teori dan Praktik. Yogyakarta: Buana Pustaka, 2004.

_______. Kamus Ilmu Falak. Yogyakarta: Buana Pustaka, 2005.

Lee, Ki-won et al. "Analysis of the Lunar Eclipse Records from the Goryeosa." The Korean Astronomical Society 49, no. 4 (2016): 163. https://doi.org/10.5303/JKAS.2016.49.4.163.

Liu, Bao Lin and Alan D. Fiala. Canon of Lunar Eclipses 1500 B.C-A.D 3000. Virginia: Willman-Bell, Inc, 1983.

Meeus, Jean. Astronomical Algorithms. Virginia: Willman Bell. Inc., 1991.

Muhajir. "Hisab Gerhana Bulan dalam Kitab Nūr al-anwar ( Analisis Pemikiran KH. Noor Ahmad SS )." Islam Nusantara 3. no. 2 (2019): 457, https://doi.org/10.33852/jurnalin.v3i2.149.

Munawwir, A.W.. Kamus Al-Munawwir Arab-Indonesia Lengkap. Pustaka Progresif, 1984.

Pannekoek, Anton. A History of Astronomy. New York: Dover Publications, 1961.

Putri, Hasna Tudar. "Tinjauan Astronomi terhadap Hisab Gerhana Bulan dalam Kitab Ittifāq Żāt al-Bain Karya Moh. Zubair Abdul Karim." Al-Marshad 6, no. 2 (2020): 178. http://dx.doi.org/10.30596%2Fjam.v6i2.5186.

Rohmah, Nihayatur. "Fenomena Gerhana Matahari Cincin dan Konjungsi (Uji Akurasi Awal Bulan Syawal & Dzulqa’dah 1442 H dalam Perspektif Kriteria 29." Al-Mabsut 9, no. 2 (2015): 213.

Stephenson, F Richard, Leslie V Morrison, and Catherine Y Hohenkerk. "Astronomical Assessment of the Solar and Lunar Eclipse Records in Bede's Ecclesiastical History and Its Continuation." Journal for the History of Astronomy 51, No. 1 (2020): 75. https://doi.org/10.1177/0021828619899188.