ANALISIS SISTEM TRACKING TELESKOP CELESTRON 80 LCM DAN HUBUNGANNYA DENGAN POTENSI KESALAHAN IDENTIFIKASI HILAL

Abstract

The tracking precision of each telescope used to see celestial objects, such as the crescent moon, varies. The purpose of this article is to assess the Celestron 80 LCM telescope's tracking accuracy when capturing photographs of the new moon and how it relates to possible mistakes in new moon identification. atop February 20, 2024, researchers used a Celestron 80 LCM telescope at the UIN Walisongo Observatory in Semarang to collect observation data. They also used an iPhone 13 smartphone camera, placed atop the telescope tube, with ISO 50 and 1/121 sec settings to take four pictures of the moon. A picture of the moon Astroimagej was then used to examine the measured light intensity values. The results were evaluated using the moving average approach to estimate the shift in the Moon's appearance until it exits the frame. According to the results of this study, the Moon object underwent an average shift of 40 pixels on the X axis and -171.9 pixels on the Y axis over the course of ten minutes. The Moon object will exit the frame based on the Y axis after 119,309 minutes, or the equivalent of the hilal height of 29.8° at the moment of rukyatul hilal, if the camera sensor has a size of 4,032 x 3024 pixels. After the azimuth value shifts by 159.75°, the crescent moon will vanish from the frame according to the X axis. The combination of the Celestron 80 LCM tracking telescope with the iPhone 13 camera sensor is therefore very important to use for observing the hilal with a height of less than 12°, and the image that appears is still in the frame.