Uncorrected Davison relationship chart
A midpoint in time
and real space.
This tool uses the midpoint between two birth instants and the arithmetic midpoint of their signed latitude and longitude, then casts a fresh chart for that derived moment and place. Exact times produce one chart; approximate times can now be scanned across ±15 minutes, ±30 minutes, ±1 hour, or ±2 hours instead of being treated as exact.
Method before interpretation
Davison is not just another name for Composite.
Both techniques combine two natal records, but they do it at different levels. Composite calculates a midpoint for each matching chart factor. Davison instead finds one middle instant between the births and one middle location, then casts a standard chart for that derived moment and place. Because the construction differs, the resulting planets, angles, houses, and aspects can reinforce one another or diverge.
Velvet Zodiac currently publishes the uncorrected Davison variant because its receipt is simple to audit: midpoint of the two absolute birth instants, arithmetic mean latitude, arithmetic mean longitude. Astro.com also documents corrected, spherical-midpoint, and reference-place variants. Those are real methodological alternatives, not errors to hide. If your two birthplaces are extremely far apart or straddle the antimeridian, compare methods before leaning heavily on houses and angles.
The calculator now accepts a declared approximate clock time for either person at ±15 minutes, ±30 minutes, ±1 hour, or ±2 hours. It scans every valid local source minute, derives the unique Davison midpoint instants, and marks sign, house, internal-aspect, and Composite-comparison classifications Stable or Boundary-sensitive. The displayed wheel remains the entered center estimate; the interval receipt tells you what survived. A completely unknown clock time is still withheld rather than replaced with noon.
Davison chart FAQ
What Davison method does Velvet Zodiac use?
This release uses the uncorrected Davison method: the exact midpoint between the two UTC birth instants plus the arithmetic mean of the two signed latitudes and longitudes. It does not silently apply the corrected-MC, spherical-midpoint, or reference-place variants.
How is a Davison chart different from a Composite chart?
A Composite averages matching natal chart positions, usually along the shorter zodiac arc. A Davison chart first derives one midpoint moment and place, then calculates where the planets actually were at that derived instant. Velvet Zodiac shows both methods side by side rather than treating them as interchangeable.
Can I use an approximate birth time?
Yes. Mark the source time Approximate and choose ±15 minutes, ±30 minutes, ±1 hour, or ±2 hours. Velvet Zodiac scans every valid local minute in the declared source range, deduplicates the resulting midpoint instants, and labels sign, house, aspect, and Composite-comparison classifications Stable or Boundary-sensitive. A completely unknown clock time is still withheld rather than replaced with noon.
What does 'Near by display threshold' mean in the comparison?
It means the Composite and Davison positions are within 3 degrees in zodiac longitude. The 3-degree threshold exists only to make the comparison table readable; it is not an aspect orb, strength rating, compatibility score, or claim that the methods mean the same thing.
Are there other Davison variants?
Yes. Astro.com documents uncorrected, corrected, spherical-midpoint, and reference-place variants. Method choice can matter most for angles and houses, which is why Velvet Zodiac names the method instead of presenting one implementation as the only Davison calculation.