Which is the Placidius astrolabe or the whole astrolabe?

Placidus and Whole are both commonly used palace systems in astrolabe divination, each with its own characteristics. Generally speaking, Placidus is relatively complex, while Whole is more concise.

1.Placidus is a complex palace system, which is based on adding the same right ascension to each quadrant. Although it is also a method combining time and place, it is more accurate in establishing the zenith position at birth.

2. The whole palace system is more concise, based on the whole ecliptic circle, divided into 12 equal palaces. Although its definition is simple, some people think it is relatively more intuitive and easier to understand when reading.

To sum up, choosing Placidus depends on personal needs and preferences. If you need a more accurate interpretation of the palace, you can choose Placidus；; If you want to interpret it more intuitively and concisely, you can choose the whole.