The Ascendant, also called the Rising Sign, is the Zodiac Sign and degree rising on the eastern horizon at the specific time and location for which an astrological chart is calculated. In a natal chart, the Ascendant forms the cusp of the First House and is one of the principal chart angles. Astrologers commonly associate it with outward expression, immediate reactions, personal style, approach to new situations, and the way an individual engages with the surrounding world. Because the Ascendant changes relatively quickly as Earth rotates, an accurate birth time and location are especially important for determining it. Its interpretation is usually considered together with its Zodiac Sign, ruling Planet, House relationships, Aspects, and the broader pattern of the natal chart.