Etymology and Cultural Significance
Originally, the pre-Islamic Arabic term al-Kaff al-Khadib "the stained hand" referred to the five stars comprising the 'W' of the constellation Cassiopeia, and depicted a hand stained with henna. The term was abbreviated and somehow came to signify β Cassiopeiae alone. The old "stained hand" was part of an asterism stretching from the Pleiades, which signified the "head" through Taurus and Perseus and into Cassiopeia, while the other "hand" was in Cetus.
Alternate common names are Chaph and Kaff, as well as al-Sanam al-Nakah "the Camel's Hump".
In Chinese, 王良 (Wáng Liáng), meaning Wang Liang, refers to an asterism consisting of β Cassiopeiae, κ Cassiopeiae, η Cassiopeiae, α Cassiopeiae and λ Cassiopeiae. Consequently, β Cassiopeiae itself is known as 王良一 (Wáng Liáng yī, English: the First Star of Wang Liang.)
Together with Alpha Andromedae (Alpheratz) and Gamma Pegasi (Algenib), Beta Cassiopeiae was one of three bright stars known as the "Three Guides" marking the equinoctial colure. This is an imaginary line running due south from Beta Cassiopeiae through Alpha Andromedae to the celestial equator, at a point where the sun's path (the ecliptic) crosses it each autumn and spring equinox.
Read more about this topic: Beta Cassiopeiae
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