Northern Black Tortoise · 12
Wei Yue Yan（Rooftop Mansion）
Wei Yue Yan is the traditional deity title for Rooftop Mansion, number 12 in the atlas and part of the Northern Black Tortoise. It follows Emptiness Mansion and precedes Encampment Mansion. This Chinese Medieval reconstruction contains 4 stars and 3 segments; HIP 109074 is the red-ringed reference star.
Asterism reference
- Position in the atlas
- 12 / 28
- Four Symbols group
- Northern Black Tortoise
- Stars in this diagram
- 4
- Determinative star
- HIP 109074
Reading this star map
Rooftop’s reference is near the bottom and connects upward toward a junction. The other stars lie at upper right and lower left. The red ring and the branch point are different. Its Chinese name Wei (危) must also be distinguished from Stomach’s Wei (胃).
Understanding the deity title
The traditional title 危月燕 (Wei Yue Yan) combines the mansion character 危, the association 月, and the animal image 燕. The astronomical entry is Rooftop Mansion. A deity portrait expresses cultural imagery; a star map records positions and connecting lines. They can be read together without expecting the star pattern to resemble the animal.
What does this calculator result mean?
If a birthday lookup returns this mansion, the entered date is assigned to it by our daily almanac rules. It does not mean everyone born that day shares a personality, or that the Moon was inside this star pattern. Compare calendar, date and assignment system before comparing tools.
Twenty-Eight Mansions sculptures · Fucheng Jade Emperor Temple, Jincheng
Photo: Patrick20242023. Resized and compressed; Shen Shui Yuan is also cropped to isolate the figure.
Original photographs · CC BY-SA 4.0Further reading: personality associations
The historical text describes the roles of celestial asterisms. The life and personality associations below are our modern interpretations, not historical claims about people born on a particular date.
「主天府天市架屋」《晉書》卷十一・天文志上・二十八舍Wei is associated with building a roof. A modern interpretation uses that image for making backups, checking routes and leaving room in a budget before trouble arrives. Preparation offers shelter, but a repaired roof should also make it possible to stop keeping watch and rest.
Sources and image credits
The National Astronomical Observatory of Japan explains the classifications and calendar concepts. Star lines follow Stellarium Chinese Medieval, with positions from HYG v4.1. Our diagrams are attributed under CC BY-SA 4.0 and represent one reconstruction, not the only historical depiction.