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New approach on study of new young crescent (Hilal) visibility and new month of Hijri calendar
Raharto M.a, Sopwan N.b, Hakim M.I.a, Sugianto Y.a
a Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology CAS Building, Bandung, 40132, Indonesia
b Astronomy Study Program, Fakultas Syariah Dan Hukum UIN Sunan Ampel, Surabaya, East Java, 60237, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 Published under licence by IOP Publishing Ltd.We present a preliminary result on criteria of a young moon crescent visibility and the beginning of new month in Hijri calendar. We present our study of all possibility of moon’s astronomical position at sun-set time in one diagram. The altitude of the moon vs the elongation between the moon and the sun, and the azimuth differences between the sun and the moon plotted over the diagram. The purpose of constructing the diagram is to see easily all used/proposed criteria of the beginning of the Hijri’ month on a single diagram, then the position of the new young crescent of the moon on the diagram can be analysed easily, whether it is included in criteria of young moon crescent (hilal) visibility or excluded. Some cases of Hijri calendar of 2017 – 2018 in Indonesia are examined and provided in this paper.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Indonesia,New approaches,Set time[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]A part of these works supported by LPPM ITB and we would like to thank for the research support in 2017. We would like to appreciate financial support from Program Penelitian, Pengabdian kepada masyarakat, dan Inovasi (P3MI) through Kelompok Keahlian Astronomi ITB in 2018[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1088/1742-6596/1170/1/012080[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]