AscendantChanges every two hours

Rising sign calculator

Your rising sign is the zodiac sign that was climbing over the eastern horizon where and when you were born. Enter the birth date, the local time and the place.

Birth date, time and place
Place coordinates and time zone

Section I

What the rising sign is

The eastern horizon

The Ascendant is the degree of the ecliptic crossing the eastern horizon at the moment of birth. The whole zodiac passes over that horizon once a day, so each sign rises for about two hours, and a birth time off by a quarter of an hour can change the answer.

Rising signs are often read as the way someone meets a new situation: the first impression, as opposed to the Sun sign's sense of purpose or the Moon sign's emotional needs.

Section II

How it is calculated

From the sky, not a lookup table

The calculator turns the local time and time zone into a precise moment, finds the sidereal time at the birthplace's longitude and solves for the point where the ecliptic meets the eastern horizon at the birthplace's latitude. It uses the same astronomy engine as the birth chart calculator.

Polar latitudes can leave the Ascendant undefined at some hours, and a clock that skipped or repeated an hour is flagged rather than guessed.