Chinese Xiu (Mansions)
Shen (Three Stars)
Also Known As Shen
White Tiger of the West
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Origin 433 BCE
The twenty-first mansion centres on the belt and body of Orion and closes the western palace. As the forelegs and body of the White Tiger it is linked to punishment, war and swift decisive action. In traditional literature it stands opposite the Heart lodge in the east, the two never appearing in the sky together, and that opposition became a common figure for estrangement between people who cannot meet. The image is an astronomical fact turned to literary use, and it recurs across Chinese poetry.
Facts
Identity
Equatorial Extent (Du)9 du (about 8.9 degrees of equatorial arc) 2Tradition: Han-era Shi Shen tradition (Kaiyuan Zhanjing) Du: the arc-degree unit of the classical Chinese calendar, where a full circle equalled 365 and a quarter du (about 0.9856 modern degrees per du). This width is the Han-era figure standardized under the Taichu calendar and preserved in the Tang-dynasty Kaiyuan Zhanjing's Shi Shen star table; later dynasties recorded small revisions as precession shifted the determinative stars, so this is one epoch's figure, not a timeless constant. It measures the mansion's extent along the celestial equator (right ascension), the coordinate system Chinese astronomy actually used, not a position on the ecliptic (tropical zodiac); the atlas has no sourced mapping from this equatorial system onto a start point in ecliptic longitude, so this figure alone cannot be substituted into a start-end boundary range the way the equal Arabic-mansion spans are. In 1752 (Qianlong year 17) the determinative stars of this mansion and of Turtle Beak (Zi) were reassigned to correct a precession-driven ordering swap that had crept in after the 13th century; Zeta Orionis is the post-1752 assignment still in modern use, not the original Han-era star. Determinative StarZeta Orionis 2Tradition: Han-era Shi Shen tradition (Kaiyuan Zhanjing) In 1752 (Qianlong year 17) the determinative stars of this mansion and of Turtle Beak (Zi) were reassigned to correct a precession-driven ordering swap that had crept in after the 13th century; Zeta Orionis is the post-1752 assignment still in modern use, not the original Han-era star. Origins
Origin Period433 BCE 1Tradition: Chinese equatorial astronomy Origin PeriodThe full set of twenty-eight lunar mansions is attested together for the first time on the lacquer box from the tomb of Marquis Yi of Zeng, sealed in 433 BCE, the earliest surviving object to record the complete list of names. 1 Origin of the NameThe English "lunar mansion" is borrowed from the Indian nakshatras and the Arabic manazil and misdescribes the xiu. A xiu is a lodge marked by a determinative star and measured in right ascension along the celestial EQUATOR; it is not a division of the Moon's ecliptic path, and the three systems are not variants of one scheme. 2 Attributions
PalaceWhite Tiger of the West 1 Learn More
The Lunar Mansion Shen (Three Stars)
Shen (Three Stars) is the twenty-first of the twenty-eight xiu, the lunar mansions of traditional Chinese astronomy. Each xiu is a segment of the sky marked by a group of stars near the celestial equator, and together they divide the heavens into the belt through which the sun, moon and planets appear to move.
Palace, animal and place in the sky
This mansion belongs to the White Tiger of the West, the quadrant of the sky lying toward the west, one of the four symbolic creatures among which the twenty-eight are shared out seven to each. In the later scheme that pairs every mansion with a creature, Shen is assigned the Ape.
The twenty-eight mansions are among the oldest elements of Chinese sky-lore, attested well before the common era and used to track the nightly progress of the moon and to fix the calendar. The system is described here as that documented astronomical and calendrical tradition, from which its astrological uses later grew.
Shen, the Three Stars of the White Tiger
Shen, the Three Stars, is the twenty-first of the twenty-eight xiu and the last mansion of the western palace, the White Tiger. It is identified with the constellation Orion, its name recalling the three bright stars of Orion's belt at its heart. In Chinese lore Shen and the mansion Xin, the Heart, stand at opposite ends of the sky and never appear together, an image of separated brothers or estranged friends. In the later astrological tradition its animal totem is the Ape. As one of the twenty-eight lunar mansions Shen closes the seven of the White Tiger. These are the conventions of the Chinese astronomical and calendrical tradition, in which the twenty-eight xiu order the heavens; with the Three Stars the White Tiger of autumn gives way to the Vermilion Bird of the south and summer.
Orion's belt anchoring Shen gives this mansion one of the most visually striking and universally recognised asterisms of any of the twenty-eight, and the same three stars anchor readings in the Vedic scheme, via the neighbouring nakshatra Mrigashira just across the boundary from Ardra, and in the Western fixed-star tradition as Orion's belt proper, so this small stretch of sky carries independently developed lore in at least three unrelated systems, a convergence explained by the belt's brightness rather than by any transmission between the traditions.
Cross-Tradition Connections
Contained In
One of the seven lunar lodges of this palace.
Originates in Language
Sources
1. Astrology and Cosmology in Early China: Conforming Earth to Heaven
David W. Pankenier, Cambridge University Press, 2013On the twenty-eight lodges and the Zeng Hou Yi lacquer chest
2. Science and Civilisation in China, Volume 3: Mathematics and the Sciences of the Heavens and the Earth
Joseph Needham, Cambridge University Press, 1959Vol. 3, the section on astronomy: the hsiu (lunar mansions), the equatorial system and the du measureQuote, Vol. 3, the section on astronomy: the hsiu (lunar mansions), the equatorial system and the du measure
The twenty-eight lodges are equatorial divisions bounded by determinative stars and so of unequal width, measured in du on a circle of 365.25 parts; their relation to the Indian and Arabic lunar mansion systems is unresolved.
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