The sky brightness measurement during the 2016 solar eclipse in Ternate

[摘要] Obscuration of the Sun by the Moon during total solar eclipse generates the changing of the sky brightness. Sky Quality Meter (SQM) was employed to measure the sky brightness during the 2016 total solar eclipse. The sky was still bright at the first contact time. It is shown by the SQM value of zero. Approaching the second contact time, the SQM value is rising up started at the value of 5.92 mpsas. The curvature profile of the SQM measurementvalue is similar to the curvature profile of the SQM measurement at the dawn and dusk. However, the flatness part of the curvature is much shorter than night time value of SQM. The maximum of SQM measurement value is lower than the SQM measurement value during the night in Ternate. It is 12.47 mpsas and happened at the maximum phase of the eclipse. It was confirmed by the fact that at the time of totality, the sky close to the horizon was still bright. There is a discrepancy between the predicted and actual second and third contact and maximum eclipse time. By assigning the maximum of SQM measurement value as the reference value of maximum eclipse time, the actual second and third time can be calculated. The shape of curvature between the actual second and third contact time is symmetry.

[发布机构] Program Studi Magister Pendidikan Fisika Universitas Ahmad Dahlan, Jl. Pramuka 42, Yogyakarta 55161, Indonesia, Pusat Studi Astronomi Universitas Ahmad Dahlan, Jl. Gondosuli 1, Yogyakarta 55166, Indonesia^1

[效力级别] 天文学

[关键词] Brightness measurements;Contact time;Curvature profiles;Maximum phase;Night time;Reference values;Solar eclipse;Total solar eclipse