07♐33 to 09♐37
The 4th Chinese lunar mansion is named 房宿 Fáng Su, “Room Mansion.” It is the 4th of the seven mansions of the Azure Dragon of the East.
The 5th asterism of the Room Mansion is called 東咸 Dōngxián, “Eastern Door.” It represents the eastern gateway of the house, which is protected from harassment by treacherous officials. It is composed of 4 stars of the constellation Ophiuchus. [1]
| 2000 | 2050 | IAU | Chinese | Orb |
| 08♐40 | 09♐22 | φ Oph | Dongxian Yi (1) | 1°20′ |
| 07♐58 | 08♐41 | χ Oph | Dongxian Er (2) | 1°20′ |
| 07♐33 | 08♐15 | ψ Oph | Dongxian San (3) | 1°10′ |
| 09♐37 | 10♐20 | ω Oph | Dongxian Si (4) | 1°10′ |
Asterism Dongxian the Eastern Door
07♐33 to 09♐37
Ma Duanlin (1317)
Four stars each in the East and West directions, north of the House Star, mark the path of the Sun, Moon, and five planets. They represent the entrance to the House, preventing licentiousness. Brightness brings good fortune, darkness brings misfortune. If the Sun, Moon, and five planets guard this area, there will be conspiracies; if Mars guards it, war will break out. [2]
Song History (1346)
There are four stars each in Dongxian (East Door) and Xixian (West Door), Dongxian north of Xin (Heart asterism) and Xixian northwest of Fang (Room asterism), representing the paths of the sun, moon, and five planets. They are the doors of the Room, used to prevent licentiousness.
Brightness signifies good fortune. If Dongxian is near Gouqian (Lock asterism), a slanderous minister will enter. If Xixian is near Shang and moves, a knowledgeable person will enter.
If the Moon or five planets enter, it is inauspicious, indicating conspiracy, the empress’s disrespect, and the people’s famine.
If Mars enters, it is inauspicious and indicates ministers plotting against the emperor.
If Mars and Venus enter together, it is inauspicious and indicates war.
If Jupiter or Saturn enter is is inauspicious and indicates conspiracy.
If a shooting star enters, it is inauspicious and indicates that the empress and concubines are unruly, and the king is worried.
If a guest star enters, it is inauspicious and indicates the ruler is unruly, and the empress and concubines are unruly. [3]