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All Journal Al-Hilal: Journal of Islamic Astronomy
Hendra Agus Prastyo
Institut Teknologi Sumatera
Religion Astronomy Earth & Planetary Sciences Physics Social Sciences

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THE USAGE OF UBVRI FILTERS AND SKY BRIGHTNESS MEASUREMENT (Study on 26 May 2021 Total Lunar Eclipse at ITERA Lampung Astronomical Observatory ) Hendra Agus Prastyo; Khabib Suraya; Singgih Prana Putra; Aditya Abdilah Yusuf; Izatul Hafizah; Adhitya Oktaviandra; Aziz Nugrahamuda Khagahdo; M R Kurniawan; Gabriella Maharani; Ababil Silahuddin
Al-Hilal: Journal of Islamic Astronomy Vol 3, No 2 (2021)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/al-hilal.2021.3.2.8485

Abstract

On May 26, 2021, the ITERA Lampung Astronomical Observatory (OAIL) got the opportunity to watch the Total Lunar Eclipse (TLE). The observations had two goals: determining the most efficient filter for observing the Penumbral Lunar Eclipse (PLE) and determining the influence of TLE phenomena on sky brightness. The acquired picture data is analyzed using the photometric approach. Six sample points are utilized to calculate the magnitude of the PLE. According to the findings, the blue filter is the generally ideal filter for detecting PLE. Tycho crater had the greatest magnitude of -18.1 while mare Imbrium had the highest magnitude of -17.2. When determining the intensity of the crater and mare, this value is impacted by various parameters, including the duration of the integration period and the aperture radius. As a result, this number still has to be adjusted to the full moon's intensity. The results of SQM measurements of the sky's brightness form a light curve pattern that declines during the umbra phase and continues to diminish until the Moon departs the Earth's penumbra. This shows that the value of sky brightness increases or the sky becomes significantly darker during the total phase, while the Moon's skyglow diminishes during TLE.
ZODIAC LIGHT DETECTION BASED ON SKY QUALITY METER (SQM) DATA: PRELIMINARY STUDY Hendro Setyanto; Hendra Agus Prastyo; Muhammad Basthoni; Fika Afhamul Fuscha; Saleh M. Al Saab
Al-Hilal: Journal of Islamic Astronomy Vol 3, No 2 (2021)
Publisher : Fakultas Syari'ah dan Hukum UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/al-hilal.2021.3.2.8477

Abstract

Zodiacal light is a night sky phenomenon that can occur before or after dusk. Additionally, zodiacal light is referred to as false dawn (fajar kadzib) or false dusk. Zodiacal light is emitted by the dust leftovers of asteroids, comets, and other extraterrestrial objects colliding along the planet Mercury's orbit to Mars. This remaining material orbits the Sun in the same direction as the four planets. When the Sun illuminates the leftover dust, it appears as a zodiacal light in the hemisphere that experiences dawn or dusk. By using linear fittings we detect the presence of zodiacal light on the light curve of the night skybrightness. The Observations were made using a digital camera and SQM. From a number of observational data obtained at six locations, it shows that there is an identical linear pattern. From this linear model, it can be seen that the zodiacal light has been observed since the sun's position at -60 degrees below the horizon. Recognizing the presence of the zodiacal light is very important to know the time of the appearance of true dawn which is the beginning of the time for the dawn prayer.
Co-Authors Ababil Silahuddin Adhitya Oktaviandra Aditya Abdilah Yusuf Aziz Nugrahamuda Khagahdo Fika Afhamul Fuscha Gabriella Maharani Hendro Setyanto Izatul Hafizah Khabib Suraya M R Kurniawan Muhammad Basthoni Saleh M. Al Saab Singgih Prana Putra