Open AccessNight sky brightness measurement during the March 2018 Earth Hour in Yogyakarta
Author(s) -
Mega Sukma,
Yudhiakto Pramudya,
Muchlas,
Okimustava
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1231/1/012003
Subject(s) - light pollution , sky , zenith , sky brightness , brightness , night sky , environmental science , meteorology , remote sensing , astronomy , physics , geography
Switching off the light for one hour is annual global event to celebrate the Earth Hour. At that time, there is also campaign to observe the night sky with minimal light pollution. Hence, during this event, it is important to measure the level of light pollution using the Sky Quality Meter (SQM) device that was directed to the zenith. The research is intended to obtain comparison of the night sky brightness (NSB) between reguler days (23 th and 25 th of March) and Earth Hour day (24 th of March). The measurement was performed in Yogyakarta that is located in -7.798893° south and 110.364992° East using the SQM-LU device. The location is the city center where the artificial light comes from the building, advertising boards, city lights and vehicles. The data distribution analysis was performed to obtain the mode value of NSB for each day. The mode value of NSB on 23 th , 24 th , 25 th of March 2018 are 15.5 mag/arcsec 2 , 14.61 mag/arcsec 2 15.02 mag/arcsec 2 and the mode value on the Earth Hour event is 17.4 mag/arcsec 2 . Hence, it can be concluded that the night sky in Yogyakarta has a high level of light pollution. By turning off the light, the light pollution can be reduced.