Casting the Horoscope

Definition

Casting the horoscope is the process of calculating and drawing an astrological chart for a specific time and place. It establishes the positions of the Sun, Moon, planets, angles, houses, and other selected points. Traditionally performed with tables and mathematical formulas, the process is now commonly completed with astrology software. Accurate date, time, location, and time-zone information are essential inputs.

Astrological Meaning

The resulting horoscope is a symbolic map of the sky used as the basis for interpretation. A natal horoscope refers to the moment of birth, while event, electional, and horary charts are cast for other precisely defined moments. Astrologers examine planetary signs, house placements, aspects, dignities, and chart angles according to their chosen tradition. Casting creates the chart itself; interpretation is the separate step of evaluating how its factors may work together.

Why It Matters

A correctly cast horoscope supports reliable astrological analysis because even small errors in time or location can alter the Ascendant, Midheaven, house cusps, or the Moon’s position. Understanding the casting process also helps readers assess chart settings, house systems, and zodiac options rather than treating a computer-generated wheel as automatically definitive. The chart provides a structured starting point, not a guaranteed account of character or events.

Related Encyclopedia Entries

• Traditional Astrology
• Astrological Terminology
• Natal Chart