Annular Eclipse

Definition

A solar eclipse occurring when the Moon, near the apogee of its elliptical orbit, has an apparent angular diameter smaller than the Sun, so the New Moon at the node only partially covers the solar disc and a bright ring (Latin annulus) of sunlight remains visible around the lunar silhouette. Annularity is a distinct geometric subtype of partial obscuration: the Sun-Moon-node alignment is tight enough to produce centrality, but the Moon’s apparent size is insufficient for totality.

In Tradition

Across modern Western practice, annular eclipses are read as eclipses (the Sun-Moon-node geometry matches a total) but ranked symbolically between partial and total in interpretive weight. Brady-influenced practitioners note that the visible solar ring keeps the Sun’s significations partially exposed, so annulars are read as moderately decisive markers rather than the full “definitive ending and beginning” associated with totality on the same axis.

In Practice

The astrologer first identifies eclipse magnitude (total / annular / partial) from a standard ephemeris or eclipse table before judging weight. The annular eclipse degree is treated as a sensitized point: natal planets or angles within roughly 1°–3° are flagged, transits to the degree are watched as activations, and the Saros series the eclipse belongs to provides additional thematic context. In mundane work the path of annularity is read in place of a path of totality, with regional weight reduced relative to a comparable total. The interpretive window of months and the degree-as-trigger procedure follow the same conventions as other eclipses.

Historical Origin

Magnitude-based classification of solar eclipses is recorded in the Babylonian celestial-omen literature, which used the arc-magnitude unit *ubānu* (“finger”) for fine-grained eclipse reckoning per Hunger and Pingree’s *Astral Sciences in Mesopotamia* (1999). Hellenistic mundane eclipse doctrine appears in Ptolemy’s *Tetrabiblos* II.4–13. Modern Western coverage of annular-vs-total weighting is treated by Bernadette Brady in *Predictive Astrology: The Eagle and the Lark*.

Etymology

Origin: Latin. Meaning: From annularis (ring-shaped) — from the ring of light surrounding the Moon's silhouette.

Further Reading

• Bernadette Brady, Predictive Astrology: The Eagle and the Lark
• Hermann Hunger & David Pingree, Astral Sciences in Mesopotamia