Contextualising Fajr Sadiq: Response to Dawn Research Findings with the Sky Quality Meter (SQM)

Maskufa Maskufa; Adi Damanhuri; Sopa Sopa; Ahmad Chairul Hadi

doi:10.21093/mj.v23i1.7293

Maskufa Maskufa Universitas Islam Negeri Syarif Hidayatullah Jakarta https://orcid.org/0000-0002-9901-7958
Adi Damanhuri Universitas Islam Negeri Sunan Ampel Surabaya https://orcid.org/0000-0001-6317-7346
Sopa Sopa Universitas Muhammadiyah Jakarta https://orcid.org/0000-0001-6100-613X
Ahmad Chairul Hadi Universitas Islam Negeri Syarif Hidayatullah Jakarta https://orcid.org/0000-0003-4742-3935

DOI: https://doi.org/10.21093/mj.v23i1.7293

Keywords: Dawn Time, Sky Quality Meter, Organization Mass

Abstract

The article needs to address the problem of dawn time too early in Indonesia. To prove this, the researcher used the Sky Quality Meter (SQM) in four locations with different sky brightness levels: Labuan Bajo, Belitung, Sidoarjo, and Bogor. In addition, the article also seeks to explain the views of the government and Islamic organization using SQM. This research uses normative, astronomical, and sociological approaches. The results showed that the value of the sun's tilt during the Dawn Sadiq period was -19.30º to -13.58º. The appearance of dawn can be detected earlier in locations with high sky brightness and low light pollution, such as in Labuan Bajo (-19.30º), while in other places with opposite conditions, the appearance of Dawn Sadiq is slower, such as in Bogor (-13.58º). If the SQM observation in Labuan Bajo is used as a reference, it will not significantly impact the current dawn schedule (dip = -20⁰). The use of SQM for dawn observation is acceptable to the Ministry of Religion and Islamic organizations. However, considering the mixed results of dawn research with SQM, the response of the Ministry of Religious Affairs, Nahdlatul Ulama, and the Islamic Association still uses dip = -20º, while Muhammadiyah shifts to dip = -18⁰. To minimize differences, it is necessary to conduct joint research on an ongoing basis to produce stable data on the setting of the sun at dawn.

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