Synastry with an Unknown or Approximate Birth Time
A noon chart is a convenience scenario, not a recovered birth time; it cannot justify exact angles, houses, or a confident Moon contact. Scope is explicit.
Overview
B houses and angles are omitted; Moon contacts are reported as a range rather than a fixed placement. This is the worked result for Synastry with an Unknown or Approximate Birth Time; it remains conditional and does not turn geometry or timing into a verdict. The comparison method is explicit: Calculate a bounded earliest-to-latest window, keep contacts that remain within the declared orb throughout it, and label every conditional result.
At a glance
- Topic
- Synastry with an Unknown or Approximate Birth Time
- Content family
- relationship comparison
- Case inputs
- A time verified; B date known but time unknown; B Moon range 28°♊–10°♋ across the civil day
- Measured finding
- B houses and angles are omitted; Moon contacts are reported as a range rather than a fixed placement
- OpenFate support
- two-chart compatibility + birth chart
- Use boundary
- conditional · source-audited · non-fated
Definition and exact scope
Unknown-time synastry retains time-stable planet contacts while quarantining angles, houses, and any Moon position that moves across the uncertainty window.
Calculation or decision rule
Calculate a bounded earliest-to-latest window, keep contacts that remain within the declared orb throughout it, and label every conditional result. 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 time verified; B date known but time unknown; B Moon range 28°♊–10°♋ across the civil day. B houses and angles are omitted; Moon contacts are reported as a range rather than a fixed placement.
Illustrative near miss; does not qualify: Assuming B was born at 12:00 and publishing a precise Ascendant, house overlay, or exact Moon contact.
School, model, and context variants
A noon chart is a convenience scenario, not a recovered birth time; it cannot justify exact angles, houses, or a confident Moon contact.
Product, safety, and verification boundary
OpenFate connects Synastry with an Unknown or Approximate Birth Time only to the two-chart compatibility flow and natal evidence; it does not score destiny or guarantee a relationship result. Synastry with an Unknown or Approximate Birth Time 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.