Calculate the Sun, Moon and planet positions for a UTC birth date and time. Get a tropical zodiac wheel and downloadable planetary chart, without invented houses.
For 1990-01-01 at 12:00 UTC, calculate all ten bodies and inspect their tropical longitude table. If your source says noon local time, convert it before using this example setup.
Example · customize the fields to beginAstronomy Engine 2.1.19 computes light-time and aberration-corrected geocentric vectors for the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Ecliptic converts those vectors to the true ecliptic and equinox of date. Each 30-degree tropical zodiac sector names a sign. A centered one-day longitude difference estimates direct or retrograde motion. Display rounds to 0.01 degrees; rounding is not a claim about birth-time certainty. No latitude, longitude, ascendant, houses or predictive reading is calculated.
Use the birth date and clock time from your source, then determine the UTC offset that applied in that place on that date. Daylight saving rules may differ from current rules. Subtract a positive offset and…
The zodiac here is tropical: twelve equal 30-degree sectors measured from the equinox. It does not use the irregular boundaries of astronomical constellations or a sidereal offset. The small marks around the…
A software calculation can produce a precise number for a guessed time, but that does not make the birth time known. If the time is unknown, mark it approximate and treat noon UTC as a placeholder.…
No. It is a planets-only tropical chart based on real geocentric positions. It does not calculate an ascendant, midheaven, houses or aspects.
These positions use the center of Earth as the observer. A location is needed for horizon-based features such as an ascendant, which this tool does not provide.
Convert it to UTC first, including the historical daylight saving offset and any date rollover. The form labels and output explicitly identify UTC.
No. The astronomical positions are calculated, but astrological personality and event interpretations are not established scientific predictions. This tool offers positions for exploration, not advice or forecasts.
Calculation takes place in your browser. The date, time and chart label are not submitted to an astronomy service. The chart is downloaded only when you choose to save it.