What did Star Catalogue (Shi Shen's Star Manual) look like?

A documentary star catalogue listing star names, associated xiu (equatorial coordinate zone), ruxiudu (right ascension difference), and qujidu (polar distance).

How did Star Catalogue (Shi Shen's Star Manual) work?

Measure each star's position using an armillary sphere → record the degree of entry into its xiu (right ascension difference) → measure polar distance (angular distance from the north celestial pole, i.e., 90° minus declination) → compile into a star catalogue.

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星表编制（石氏星经）

Star Catalogue (Shi Shen's Star Manual)

The world's earliest star catalogue, recording the equatorial coordinates (ruxiudu and qujidu) of 121 stars. Predates the Western catalogue of Hipparchus by approximately 200 years.

星表编制

Scientific Principle

Equatorial coordinates: ruxiudu → right ascension; qujidu → convertible to declination. Spherical astronomy coordinate measurement.

星表编制（石氏星经）

Star Catalogue (Shi Shen's Star Manual)

Scientific Principle

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