Judhistira Aria Utama, Taufiq Hidayat, Lala Septem Riza
Every time the Earth is impacted by celestial bodies of various sizes, some produce bright meteors known as fireballs. This study utilizes observational data from USG (U.S. Government) sensors. From 871 fireball data (as of July 30, 2021), we selected 249 events accompanied by pre-impact velocity information. Using the available velocity information and calculated total impact energy, we have calculated the impact velocity, photometric mass, radius (assuming a density value that complies with the P.E. criteria), and an estimate of the absolute magnitude of the parent body outside the atmosphere. Based on the cumulative number of events with the absolute magnitude of the parent body equal to or lower than H0, the fireball flux is 8 fireballs event per year over the Earth's whole surface for H ≤ 31.5 which is equivalent with D ≥ 3 meters across the Earth's surface. Our simple power-law model for predicting the number of meteoroids as the parent body for fireballs event with absolute magnitude < H0, corresponds to the cumulative number of a sub-class of small Near-Earth asteroids (NEAs) with orbits similar to the Earth's known as Arjuna. © 2023 Author(s).
Department of Physics Education, Faculty of Mathematics and Natural Sciences Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229, Bandung, 40154, Indonesia; Astronomy Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia; Department of Computer Science Education, Faculty of Mathematics and Natural Sciences Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229, Bandung, 40154, Indonesia
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