Perbandingan diameter sudut dan selisih jarak tampak bulan menggunakan persamaan matematis ZACAAS untuk Afocal Astrophotography pada fenomena Sturgeon Moon dan Blue Moon sebagai bahan materi lembar kerja peserta didik
Abstract
The Cakrawala UPI Research Center (Cakrawala Sky-Discern Station), situated in Bandung, conducted a scientific investigation of the supermoon phenomenon, often referred to as the sturgeon moon and blue moon. The primary objective of this study was to ascertain the variations in angular diameter and visible distance between these phenomena in comparison to a standard full moon. Three sets of images were captured on the dates June 3, August 1, and August 31, 2023, employing consistent methodologies, instruments, and geographical locations. The instrumentation utilized included a Samsung Galaxy A12 smartphone camera, a Sky-Watcher Telescope N 130/650 Starquest EQ (a reflector telescope), and a 25mm eyepiece. It's noteworthy that all images were concurrently obtained. The distinctions among these phenomena were analyzed using specialized astronomy software, AstroimageJ. Our analysis involved calculating the difference in pixel diameter, acquired from AstroimageJ, and estimating the variance in visible distance through the application of the small angle theorem. The angular diameters, computed utilizing the mathematical equation known as ZACAAS, for the dates June 3, August 1, and August 31, were 1864'', 1942'', and 1969'', respectively. Correspondingly, the visible distances were determined to be 368,658 km, 356,164 km, and 355,033 km. Based on this empirical data, we confidently assert that, within the context of this particular astronomical phenomenon, the blue moon exhibits macro characteristics, while the sturgeon moon displays micro attributes, owing to its larger angular diameter and shorter visible distance. These findings, derived from authentic astronomical observations conducted using the afocal astrophotography technique, hold potential for integration into educational materials for students studying astronomy.
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