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Beta Capricorni
Beta Capricorni (β Cap, β Capricorni) is a star system in the constellation Capricornus. It has the traditional name Dabih, which comes from the Arabic الذابح ''al-dhābiḥ'', meaning "the butcher". The β Capricorni system is located 328 light years from Earth. Because it is near the ecliptic, β Capricorni can be occulted by the Moon, and also (rarely) by planets.
In Chinese, (), meaning ''Ox (asterism)'', refers to an asterism consisting of β Capricorni, α2 Capricorni, ξ2 Capricorni, π Capricorni, ο Capricorni and ρ Capricorni.〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, β Capricorni itself is known as (, (英語:the First Star of Ox).)〔 (香港太空館 - 研究資源 - 亮星中英對照表 ), Hong Kong Space Museum. Accessed on line November 23, 2010.〕
==Visual double==
With binoculars or a small telescope, β Capricorni can be resolved into a double star. The brighter of these two components, β¹ Capricorni or Dabih Major, has an apparent magnitude of +3.05, while the dimmer one, β² Capricorni or Dabih Minor, has an apparent magnitude of +6.09. The two components are separated by 3.5 arcminutes on the sky, putting them at least 21,000 AU (0.34 light years) apart. They take approximately 700,000 years to complete one orbit. Both of these components are themselves made up of multiple stars.
Due to the complexity of this system, several different schemes have arisen to denote the subcomponents. This article follows the naming used in the Multiple Star Catalogue.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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