Davison Chart

Definition

A Davison chart is a single chart cast for the moment in time and the place on Earth exactly halfway between two births: the average of the two birth dates and times taken as one instant, and the average of the two latitudes and longitudes taken as one location. Unlike the composite chart, the Davison belongs to a real moment in real time at a real place — so it is a genuine chart rather than a made midpoint construction.

In Tradition

Modern Western relationship astrologers treat the Davison chart as a second relationship-chart technique alongside the composite. Because the Davison is a genuine chart cast for a real moment and place, you can move it forward with secondary progressions and solar arc directions and read ordinary transits to it, just as with a birth chart — something the made-up midpoint composite cannot do. The two often land on different signs and houses, which astrologers read as complementary pictures of the same relationship, not a contradiction.

In Practice

To build a Davison chart you (i) average the two birth times to get a midpoint instant on the calendar — so a 1980 birth and a 1990 birth give a 1985 midpoint date — (ii) average the two latitudes and the two longitudes to get a midpoint place, and (iii) cast an ordinary chart for that instant at that place. You then read it as a chart of the relationship itself. Astrologers commonly run progressions and transits to the Davison chart to time how a relationship develops — something the made-up composite simply doesn't allow. Some use both the Davison and the composite on the same couple and lean on whichever tells the clearer story for the question at hand.

Historical Origin

The Davison chart is a 20th-century Western technique developed by Ronald C. Davison (1914–1985), longtime president of the Astrological Lodge of London and editor of Astrology, the Lodge's journal, as an alternative to the made-up midpoint composite. He sets it out in his book Synastry: Understanding Human Relations Through Astrology, and Robert Hand treats it in later work. The technique has no classical forerunner in the Hellenistic, Arabic, or pre-modern Western sources — like the composite, it is a distinctly modern relationship-astrology tool.

Etymology

Origin: English. Meaning: Named after astrologer Ronald C. Davison (1914-1985) who developed the technique.

Definition

In Tradition

In Practice

Historical Origin

Etymology

Further Reading