Imum Coeli

Definition

The Imum Coeli, usually abbreviated IC, is one of the four principal angles of an astrological chart. Its Latin name means “bottom of the sky.” It lies opposite the Midheaven and marks the lower intersection of the local meridian with the ecliptic. In many house systems, it is also the cusp of the fourth house, although angles and house cusps are calculated differently in some systems.

Astrological Meaning

Astrologers associate the Imum Coeli with roots, home, family background, privacy, and the foundations of inner life. Its zodiac sign may describe qualities a person seeks in a secure personal environment, while planets closely conjunct the IC can emphasize particular experiences or needs within domestic and private life. The IC’s ruling planet, its condition, and aspects to the angle add further context. Interpretation should also distinguish the IC itself from the broader fourth house, since they are related but not always identical factors.

Why It Matters

The Imum Coeli helps balance the chart’s public and private dimensions. While the opposing Midheaven often concerns vocation, reputation, or visible direction, the IC points toward what supports a person away from public view. Examining this angle can clarify recurring themes involving belonging, ancestry, emotional grounding, and the meaning of home. Its symbolism is best understood alongside the entire natal chart rather than treated as a fixed account of family history or destiny.

Related Encyclopedia Entries

• Traditional Astrology
• Astrological Terminology
• Natal Chart