Sun Sign vs. Rising Sign: What's the Difference?
"I'm a Leo with Scorpio rising." While almost everyone knows their zodiac sign, the rising sign remains more mysterious: we know it exists, but often not how it's determined or why you need your time of birth to find it. Sun sign, rising sign, zodiac: here are the basics explained simply, and how to calculate yours with our rising sign calculator.
The zodiac: a band of sky divided into twelve
Seen from Earth, the Sun appears to follow a fixed path against the stars over the course of a year: the ecliptic. Western astrology divides this circle into twelve equal 30-degree sectors, the twelve signs of the zodiac, from Aries to Pisces. The starting point, 0° Aries, corresponds to the Sun's position at the March equinox, around March 20 or 21.
This division, called the tropical zodiac, is tied to the seasons rather than to the constellations. Because of a slow wobble of the Earth's axis, the precession of the equinoxes, the signs and the constellations they were named after have drifted apart by about one sign since antiquity. That's why you sometimes read that "the signs have changed." Western astrology nevertheless continues to use the tropical zodiac, while Indian astrology is based on a sidereal zodiac, aligned with the stars.
The sun sign: where the Sun was
Your zodiac sign, the one in horoscopes, is actually your sun sign: the sector of the zodiac the Sun was in at the moment you were born. Since the Sun moves through one sign in about a month, your birthday is enough to work it out.
The dates published in magazines are averages, though. The Sun's entry into a sign can shift by a day from year to year, and even depends on the time of day. If you were born "on the cusp" between two signs, only a precise calculation can tell which one is yours.
In astrology, the sun sign is associated with your core identity, your will and the way you assert yourself: who you are deep down.
The rising sign: the sign on the eastern horizon
On top of its yearly path, the sky also turns around us every day, because the Earth rotates. Over twenty-four hours, the twelve signs of the zodiac each rise in turn on the eastern horizon, just as the Sun rises in the morning. The rising sign, or ascendant, is the sign that was rising on the eastern horizon at the exact moment and place of your birth.
Since the twelve signs pass by in a single day, the rising sign changes on average every two hours. Two people born on the same day, in the same city, can therefore have different rising signs if they were born a few hours apart. In reality, this duration varies depending on the sign and the latitude of the place.
Traditionally, the rising sign is associated with your outward personality, your temperament and the way you approach the world: the first impression you give, before others discover your more private sun sign.
How the two combine
In astrology, the sun sign and the rising sign complement each other. A Leo with Virgo rising, for example, is described as combining the warmth and need for recognition of Leo with a more reserved, methodical appearance. When the sun sign and rising sign are the same, it's sometimes called a "double sign," said to reinforce the associated traits.
The rising sign is also the starting point of the birth chart: it marks the beginning of the first astrological house, and the opposite point, the descendant, marks the beginning of the seventh, associated with relationships.
Astrology belongs to cultural and symbolic tradition; it has no proven scientific basis. The calculated positions, on the other hand, rely on very real astronomical calculations.
Why your time of birth matters so much
For your sun sign, the date is almost always enough. For your rising sign, the time is essential, and it needs to be as precise as possible: an error of thirty minutes can be enough to change signs, especially if the rising sign is close to the boundary between two signs.
Where can you find it? In many countries, the time of birth appears on the full or long-form birth certificate, which you can request from the civil registry or vital records office of your place of birth. Practices vary: in England and Wales, for example, the time is usually recorded only for multiple births. Hospital records, a baby book or family memories can also give an indication, but less reliably.
You also need to take into account the official local time in force on the date and at the place of birth, including daylight saving time, which hasn't always existed and whose rules have changed over the decades. This is a frequent source of error in manual calculations.
Your place of birth matters too
The rising sign depends on the horizon, and therefore on where you are on Earth. The longitude of the place affects sidereal time, and the latitude changes how quickly the signs rise. Two babies born at the same local clock time, one in Boston and the other in Washington, D.C., don't have exactly the same rising sign.
Calculating your rising sign online
Our rising sign calculator performs this astronomical calculation directly in your browser:
- Enter your date of birth.
- Enter your time of birth, as shown on your birth certificate. If you don't know it, tick the box provided: only your sun sign will be calculated.
- Type the name of your place of birth and pick it from the list. The tool finds its coordinates and automatically applies the right time zone, daylight saving time included.
- Click "Find my rising sign": you get your sun sign, your rising sign with its exact degree, and a short description.
If your rising sign is less than one degree from the neighboring sign, a warning lets you know: double-check your time of birth, as a few minutes can tip the result.
In short
Your sun sign depends on the Sun's position on the day you were born; your rising sign, on the sign rising on the eastern horizon at the exact time and place of your birth. The first changes every month, the second about every two hours. To find yours precisely, get hold of your birth certificate and let the calculation do the rest.