Chinese 28 Lunar Mansions: Names and Astronomy Guide

The word “mansion” suggests a lodging place along the heavens. It helps explain the association with the Moon’s journey against the stars, but the system also served the observation of other celestial bodies. Its names belong to the history of Chinese astronomy as well as to Chinese cosmology.

Mansions, Star Patterns and Reference Stars

Three distinctions make a traditional sky chart easier to read:

The name of a prominent asterism can also identify the wider mansion containing it. A determinative star supplies a reference for measurement; it does not mean the mansion consists of that star alone.^[1][8]

The framework is organized around the celestial equator and north celestial pole. That makes an equal division of the ecliptic into twenty-eight slices a misleading substitute. A printed list of names is not enough to reconstruct a particular historical coordinate system: the catalog and its reference conventions matter.^[3]

All Twenty Eight Names and the Four Symbols

The Four Symbols (四象, sìxiàng) group seven mansions apiece: the Azure Dragon (青龙, qīnglóng) in the east, Black Tortoise (玄武, xuánwǔ) in the north, White Tiger (白虎, báihǔ) in the west and Vermilion Bird (朱雀, zhūquè) in the south. Black Tortoise is also translated as Dark or Murky Warrior.^[2]

Here is the conventional sequence beginning with Horn. The English glosses aid comparison; they do not replace the Chinese names, and some translations differ between publications.

The characters preserve distinctions that unaccented spellings can hide: Tail, Rooftop and Stomach can all appear as “Wei,” while Wall and Net can both appear as “Bi.” Turtle Beak uses the astronomical reading zī, and Three Stars uses shēn. The wider Four Symbols guide explains the symbolic figures beyond this name list.

Why Twenty Eight Does Not Mean a Twenty Eight Day Month

The Moon completes a circuit against the background stars in about 27.3 days. Returning to the same lunar phase, such as new moon to new moon, takes about 29.5 days because Earth and the Moon are also moving around the Sun.^[4]

These are different reference cycles. The mansions’ lunar association concerns motion against stars; the Chinese lunar calendar follows lunar phases in numbering its months.

“Roughly one mansion per day” is an introductory approximation. It does not assign exactly twenty-four hours to every mansion, make their unequal spans equal or give each numbered date of every lunar month a permanently fixed astronomical mansion.

A useful check is to ask what is repeating. A Moon phase repeats its relationship to sunlight. A mansion position describes where the Moon is against a stellar reference. A calendar’s rotating label can be a further, separately defined cycle.

Early Evidence and the Growth of Star Mapping

A lacquer clothing chest from the tomb of Marquis Yi of Zeng provides an early physical record of the complete names. Its lid places the twenty-eight around a large character representing the Northern Dipper, with a dragon and tiger on opposite sides. The object belongs to the early Warring States cultural setting.^[5]

The complete name sequence documents an established scheme by that period. It does not identify the moment of invention. The dragon and tiger make the chest useful evidence for the accompanying directional imagery.

Chinese star mapping continued to change. Later catalogs assembled and revised named asterisms and stellar positions. Mansion names therefore provide continuity without guaranteeing that every drawing, star identification or measured boundary remained identical across centuries.^[2]

Traditional Uses: Observation, Almanacs and Sacred Images

As an astronomical framework, the mansions helped describe celestial positions. A record could relate a moving body to a known star region, giving readers a common reference rather than an unqualified statement that something appeared “in the sky.”^[1][8]

Almanacs attach another kind of meaning to the same names. A published date-selection table, for example, gives activity-specific recommendations for mansion days: a day may be classified differently for marriage, construction or burial. That documents a traditional judgment system; it does not demonstrate that the assigned mansion causes those outcomes.^[6]

For reading this layer, see the Chinese almanac guide and the explanation of auspicious-date selection. Preserve the almanac’s stated method instead of treating a daily label as a direct astronomical observation.

The mansions also appear as personified deities. A sixteenth-century handscroll, attributed to Qiu Ying but possibly itself a later copy, depicts divinities of the planets and twenty-eight constellations. Such a painting records artistic and religious imagery rather than the physical appearance or scale of its star regions.^[7]

How to Compare a Sky Chart with a Calendar Entry

Begin by identifying the object in front of you. A star chart, daily almanac and deity painting require different kinds of reading.

• Check the label: Match the Chinese character before matching an English translation or unaccented romanization.
• Check the reference: Does the chart identify an asterism, a determinative star or a wider mansion region?
• Check orientation: Establish whether you are viewing the sky from within the celestial sphere or looking at a reversed external representation; do not assume every historic map faces the same way.^[8]
• Check the assignment: For a calendar, ask which rotation or counting convention assigns the name to that date. A cyclic label alone does not report a measured lunar position.

Compare purpose and conventions before deciding whether two sources disagree about an actual celestial position.

FAQs About the Chinese Twenty Eight Lunar Mansions

Are the mansions the same as the twelve zodiac animals?

No. The Chinese zodiac animals belong to a twelve-part cycle associated with the Earthly Branches. The mansions provide twenty-eight stellar regions. The Chinese and Western zodiac comparison explains another distinction between systems that are often loosely grouped under “astrology.”

Why do some traditions use twenty seven mansions?

Different regional and religious calendar traditions use different schemes. In the twenty-seven-mansion calendar tradition described for Japan, Ox is omitted from the twenty-eight-name sequence. That is a specific transmitted system, not a reason to delete Ox from the Chinese list above.^[3]

Can a birthday mansion establish someone’s personality?

A birthday label can identify an assignment under a stated traditional calculation. The existence of that classification does not establish that people sharing it have the same personality or future.

Sources

[1] National Astronomical Observatories, Chinese Academy of Sciences. Astronomical Terms: Determinative Star

[2] Hong Kong Space Museum. English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Names

[3] National Astronomical Observatory of Japan. Calendar Wiki: Twenty-Eight and Twenty-Seven Mansions

[4] NASA. Top Moon Questions: Orbital and Phase Cycles

[5] Hubei Provincial Museum. Marquis Yi of Zeng: Lacquerware

[6] Hok Ming. Twenty-Eight Mansion Date Selection, 2024

[7] Metropolitan Museum of Art. Divinities of the Planets and Constellations, accession 1989.235.4

[8] British Library, International Dunhuang Programme. The Chinese Sky: The Constellations