Birth Chart CalculatorYour Sun, Moon & Rising Signs

Your Sun is your core identity — the self you're growing into. Your Moon is your inner emotional landscape, the part of you that only intimates see. Your Rising (Ascendant) is the mask you wear out the door — the first impression people pick up before they know you.

Sun and Moon still work — the Moon shifts signs roughly every two and a half days, so for most birth dates a noon estimate is accurate. Rising sign requires birth time and place because it depends on which part of the sky was rising at the exact minute you were born. Without a time, leave the Rising line blank.

Place gives us two things: the local time zone (so we can convert your birth moment to UTC correctly) and the geographic coordinates needed to compute the Ascendant. The Sun and Moon positions barely depend on place; the Rising sign depends on it entirely.

Positions are calculated from standard astronomical formulas (Meeus / astronomia library) to well within a fraction of a degree — more than enough precision to identify the correct sign. The main source of error is wrong birth time, not the math.

Tropical (Western). Signs are tied to the seasons — Aries always begins at the spring equinox — not to the visible constellations, which have drifted due to precession.