Rising Sign (Ascendant) Calculator
Calculate your rising sign from your birth date, exact time and place, using real sidereal-time astronomy.
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What Is the Rising Sign?
The rising sign (ascendant) is the zodiac sign that was rising on the eastern horizon at the moment and place of your birth. It changes roughly every two hours, which is why the exact birth time and location are essential. The tool computes local sidereal time from your inputs and derives the ascendant with the standard spherical-astronomy formula.
In astrology the ascendant is associated with outward personality and first impressions. A few minutes of birth-time error can shift the result near sign boundaries. Offered for entertainment.
Frequently Asked Questions
Why do I need the exact time and city?
The ascendant moves through all twelve signs every day — about one sign every two hours — and depends on geographic latitude and longitude. Without an accurate time the result can be off by one or more signs.
What if my birth certificate time is rounded?
Try a range: e.g. 10:15 and 10:45. If both give the same sign you are safe; if not, the true ascendant depends on the precise minute. Historic daylight-saving practice can also shift the offset — check whether DST applied on your birth date.
Is this the same as my Sun sign?
No. The Sun sign depends only on the date; the ascendant depends on time and place. Two people born the same day in different cities or hours usually have different ascendants.
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Rising Sign (Ascendant) Calculator