Davison Relationship Chart
A Davison chart derives a date, time, and place midway between two birth records, then calculates an ephemeris chart for that derived event. Scope is explicit.
Overview
The midpoint receipt records a real midpoint instant and 37°N 96°W before calculating the chart. This is the worked result for Davison Relationship Chart; it remains conditional and does not turn geometry or timing into a verdict. The comparison method is explicit: State how temporal and geographic midpoints are found, including longitude wrap and time-zone conversion, before calculating bodies, angles, and houses.
At a glance
- Topic
- Davison Relationship Chart
- Content family
- relationship comparison
- Case inputs
- A: 1990-01-01T12:00Z at 40°N 74°W; B: 1992-01-01T12:00Z at 34°N 118°W
- Measured finding
- the midpoint receipt records a real midpoint instant and 37°N 96°W before calculating the chart
- OpenFate support
- knowledge reference only
- Use boundary
- conditional · source-audited · non-fated
Definition and exact scope
A Davison chart derives a date, time, and place midway between two birth records, then calculates an ephemeris chart for that derived event.
Calculation or decision rule
State how temporal and geographic midpoints are found, including longitude wrap and time-zone conversion, before calculating bodies, angles, and houses. The receipt retains the chosen input record, reference frame, tolerance, and version, then identifies the first step where an independent recalculation diverges.
Worked case and illustrative near miss
A: 1990-01-01T12:00Z at 40°N 74°W; B: 1992-01-01T12:00Z at 34°N 118°W. the midpoint receipt records a real midpoint instant and 37°N 96°W before calculating the chart.
Illustrative near miss; does not qualify: Averaging two finished natal charts produces a composite chart, not a Davison time-and-place midpoint.
School, model, and context variants
The derived place can be geographically impractical and has no biographical event status; it does not prove that a relationship must exist or endure.
Product, safety, and verification boundary
OpenFate publishes Davison Relationship Chart as an auditable knowledge reference and does not claim a dedicated calculator or generated result. Davison Relationship Chart preserves contrary observations and uncertainty. It cannot replace consent, professional help, location research, or a person’s account.
Sources and editorial basis
- NCGR-PAA Level III CurriculumNCGR-PAA Level III Curriculum, “Synastry” and “Solar Return”, pp. 2–3; “Classical Astrology: Timing”, p. 3; forecast bibliography, pp. 5–6The NCGR-PAA advanced curriculum lists the inputs, calculation distinctions, and synthesis steps taught for synastry, composite and Davison charts, solar and lunar returns, transits, progressions, solar arcs, and profections. It documents professional curriculum scope, not empirical validation.
- Astrodienst Comparative Astrology and Synastry ReferenceAstrowiki “Comparative Astrology”, section listing Synastry, Midpoint Composite, and Davison methods; “Synastry”, section “Methods”Astrodienst reference material distinguishing synastry overlays, midpoint composite charts, and Davison relationship charts. It is used for method ownership and calculation distinctions, not to certify attraction or compatibility.
- Organization for Professional Astrology: Code of EthicsOPA Code of Ethics §1(c) Accurate Data, §1(j) Fatalistic Statements and client autonomy, §1(k) Charts of Others, and §2(f) Scope of Practice and referralAn independent practitioner code covering accurate data, confidentiality, client welfare, informed practice, competence, and referral boundaries.