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Cassiopeia · Cas · ζ Cas · HR 153 · HIP 2920 · magnitude 3.69

traditional Chinese single star asterism: an auxiliary road to Gedao; also represents the chief assistant to maintain roads. Gedao (the flying corridor) is a long chain of stars next to the Purple Palace enclosure const…

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Astronomy

Official IAU information

Designation

HR 153

HIP

2920

Bayer ID

ζ Cas

Visual magnitude

3.69

Right ascension (J2000)

9.24285°

Declination (J2000)

53.8969°

IAU adoption

2017/06/30

Name origin

traditional Chinese single star asterism: an auxiliary road to Gedao; also represents the chief assistant to maintain roads. Gedao (the flying corridor) is a long chain of stars next to the Purple Palace enclosure constellation. Paradoxically, the auxiliary road is considered a single star asterism as attested in several historical star charts (e.g. the famous Suzhou map). Sun and Kistemaker (1997) who studied sources from the Han dynasty (around the year "0" plusminus 200 years) identify ζ Cas with this single star. Another researcher, Sun Shuwei, who dealt with the Xinyixiangfayao Star Map from Su Song (苏颂, 1020-1101 CE) identifies δ Cas. Both is plausible.

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