OUR METHOD / SOURCES AND LIMITS

Methods and calculation limits

We distinguish calculated positions, interpretations within a symbolic tradition, and behaviours that need to be checked against real life. A single chart factor or card cannot establish another person's thoughts or guarantee an outcome.

Birth charts and synastry

Personal charts and synastry use Astronomy Engine 2.1.19 for geocentric tropical positions. You can search for a birth city or enter an IANA time zone or the UTC offset in effect at birth. City data and historical time-zone rules may be incomplete; verify the place and recorded time.

With an accurate birth time and selected city, the tools can calculate the ascendant, midheaven and Placidus, whole-sign or equal houses within 60° north or south. Planetary motion is estimated; near a station, check the exact time and another ephemeris. Lunar nodes are not currently included. Unknown birth time is treated as uncertain rather than invented. A limited reference comparison is not a complete professional validation, and sampling can miss short boundary crossings.

Tarot

The 78-card deck is drawn without replacement within a spread; each card's orientation is generated randomly. The site offers introductory card meanings and limited connections between positions. The meanings and combinations have not completed full professional review. You may choose to save a spread locally or delete it.

Four Pillars and lunar mansions

The Four Pillars tool uses lunar-javascript 1.7.8, solar terms for year and month, and a choice of midnight or 23:00 day boundary. An optional apparent solar time mode uses the birthplace time zone and longitude. Historical time zones, solar terms and day-boundary cases still need professional verification.

The lunar-mansion tool uses a stated 27-mansion Chinese lunar-calendar table to calculate birth mansions, directional relationships and distance categories. Other calendars and traditions may differ. A small set of cross-checks does not establish accuracy for every date. The daily mansion follows the stated Beijing-date method and is not a prediction of someone's actions.

Inputs and saving

Birth inputs are processed in the browser and are not placed in the URL. You choose whether to save supported results or notes locally. If you explicitly consent to an AI reading, the calculated summary and your question are sent to the provider identified on that page. Read the privacy notice for more detail.