Quintile Aspect

latin: quintilis

Definition

The 72-degree aspect, generated by dividing the 360-degree circle into five equal parts and equivalent to inscribing a regular pentagon in the zodiac. The quintile is a minor aspect in the standard modern Western table, ordinarily given a narrow orb (commonly 2°), and read as a marker of creative self-expression, individualized talent, and the geometric signature of the five-pointed star and the golden section.

In Tradition

Across the modern Western tradition the quintile is consistently linked to creativity and individuation. Martin's Pythagorean framing names it 'the aspect of 72 degrees created when the horoscope is divided by five,' describing 'creativity, joy and consciousness' and connecting the aspect to the pentagram and the golden section. Rudhyar's 1936 humanistic framing reads the quintile as the individual-factor register: it 'shows the creative freedom of the individual in molding materials into forms that are true to the idea they are meant to express.'

In Practice

Practitioners identify the quintile by checking for any pair of chart-factors separated by approximately 72° (one-fifth of 360°), applying a tight orb of around 2°. The quintile and its derivatives — the bi-quintile (144°), the semi-quintile (36°), and the related quintile-series aspects — are read as the chart's individual-creative signature: where the person's distinctive talent or genius-touch lives, the angle by which routine action becomes inspired performance. The quintile series operates as a third aspect-register distinct from the triangular (trine / sextile, creative-ideation) and quadrangular (square / opposition, materialisation) families in Rudhyar's humanistic-astrology mapping. Martin's Pythagorean reading frames the quintile as the 'first union of masculine and feminine' (since five = two + three), connecting the aspect to sacred-geometry use in Greek temples and Gothic cathedrals.

Historical Origin

The quintile is documented as a Western development beyond the four canonical Ptolemaic aspects (conjunction, sextile, square, trine, opposition). Johannes Kepler's *Harmonices Mundi* (1619) is the canonical early-modern source for the harmonic minor aspects including the quintile-series. Rudhyar's *The Astrology of Personality* (1936) elevates the quintile in the 20th-century humanistic-astrology revival; Martin's *Mapping the Psyche Vol 2* documents the standard modern Western framing.

Etymology

Origin: Latin. Meaning: quintilis ('fifth'), from quintus ('fifth'); names the aspect as the fifth-part division of the circle. Related terms: pentagram (Greek pente, 'five') and the golden section, both geometric figures generated by the same fivefold division..

Definition

In Tradition

In Practice

Historical Origin

Etymology

Further Reading