STUDI KONTRAS CITRA BULAN SABIT DENGAN KAMERA DSLR
Determination of the start of the months in the Hijri calendar is identical to the observation of the young Moon crescent (hilal). Currently, observation of hilal is gaining attention from various interested groups by using instruments which are easily found and widely available in the market. The u...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/49896 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Determination of the start of the months in the Hijri calendar is identical to the observation of the young Moon crescent (hilal). Currently, observation of hilal is gaining attention from various interested groups by using instruments which are easily found and widely available in the market. The use of instruments such as portable telescopes and DSLR cameras is one of them. The shooting procedure of the Moon crescent with a combination of these equipments is discussed in this work. The images are reviewed in the Red, Green, and Blue channels. The aperture photometry method was used to produce the brightness of the Moon and the brightness of the background sky. These two brightness values can be used to determine the contrast value. Contrast is related to the parameter of sky brightness, namely the elongation angle and the zenith distance of the Sun through a mathematical approximation which is written as ???? = ???? (????,????). This function is represented by two-dimensional polynomial functions of order 2 and order 3. |
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