Lunar mansion 22 of 28

Well井

One of the seven mansions of the Vermilion Bird of the South.

Group
Vermilion Bird of the South
Weekday planet
Jupiter
Animal
Wild dog
Branch
未
Building
Good
角亢氐房心尾箕斗牛女虛危室壁奎婁胃昴畢觜參井鬼柳星張翼軫
Its place among the twenty-eight

東井八星,天之南門,黃道所經,天之亭候,主水衡事,法令所取平也。

Jin Shu, Treatise on Astronomy

What it is

The southern gate of heaven, in charge of water and fair law.

In the almanac

The almanac gives each day one mansion in a fixed cycle. Xie Ji Bian Fang Shu traces the day-by-day count to an old Western Regions text on the seven planets. The Building row is from the Yu Xia Ji, which rates each mansion for building work.

Sources Jin Shu, Treatise on Astronomy; Xie Ji Bian Fang Shu, vol. 1; Yu Xia Ji.