Imum Coeli
Imum Coeli: the lower meridian point exactly opposite the Midheaven. Covers calculation, one case, alternatives, and limits.
Overview
Imum Coeli: Support for this interpretation requires repeated evidence that the lower meridian point is the exact 180-degree counterpart to the Midheaven, so its first evidence is axis integrity rather than a story about home or ancestry. The guide keeps the calculated field separate from one bounded illustration, an ordinary alternative, and a stop rule.
At a glance
- Reading focus
- Use the lower meridian point exactly opposite the Midheaven as an interpretive question, not a measured trait or promised event.
- Meaning boundary
- Imum Coeli is a calculated angle or point, not a planet, concerned with the lower meridian point exactly opposite the Midheaven. Its longitude depends on the declared geometry or formula and carries no physical agency.
- Evidence to check
- Verifies the meridian axis before any private-life symbolism. Support for this interpretation requires repeated evidence that the lower meridian point is the exact 180-degree counterpart to the Midheaven, so its first evidence is axis integrity rather than a story about home or ancestry.
- Calculated chart fields
- Imum Coeli longitude from birth time, coordinates, and the declared formula
Definition and scope
Imum Coeli is a time-and-place-dependent horizon or meridian angle, not a planet. Confirm the geometry before traditional symbolism about the lower meridian point exactly opposite the Midheaven. It is defined exactly 180° from its paired point.
Calculated points have no planetary domicile, exaltation, sect, joy, station, or retrograde cycle. Read the formula, longitude, sign, house, axis partner, close aspects, house system, and birth-time reliability; never infer a partner, vocation, fated meeting, or guaranteed event from one point.
Evidence and method
OpenFate's reproducible calculation layer returns the chart fields listed above. Reading tools may build traditional narratives from them, but personality, compatibility, and outcomes are not objective measurements or guarantees.
Example and near-miss
Illustrative case, not proof: A data import showed the Midheaven at 22°41′ Taurus and the Imum Coeli at 21°59′ Scorpio. The forty-two-minute discrepancy signaled rounded coordinates from a different source. The reviewer discarded the mixed value, recomputed both angles from the same birth receipt, and recovered an exact opposition at 22°41′ Scorpio. Only after that repair did she discuss private foundations as symbolic language. She did not fill in family history, because geometry can establish the axis but cannot supply events that were never reported.
Variants and context
Modifiers and context: Any update to time, place, timezone, zodiac, or MC propagates to the IC. Keep the paired longitudes, source receipt, and exact opposition in one calculation version.
Near-miss and alternative: A person who values privacy may seem IC-oriented, yet safety, culture, housing, or temperament can explain privacy. Behavior does not validate a meridian point.
Limits and verification
Stop rule: The IC is not a planet and cannot reveal ancestry, childhood, property, parents, trauma, nationality, or end-of-life circumstances. Family facts require consent and records.
Imum Coeli uses OpenFate editorial synthesis for traditional symbolism; it is not scientific evidence or a causal claim.
Sources and editorial basis
- Faculty of Astrological Studies: Foundation CourseFoundation Course, H2 “Module 1: Introduction to Astrology: Planets, Signs and Houses”, H2 “Module 2: Chart Skills I”, H2 “Module 3: Chart Skills II”, and H2 “Foundation Practice Module (three months tuition time)”; Module 1 key topics cover planets, zodiac signs, and twelve houses, while Module 2 covers aspects and aspect patternsA practitioner curriculum used to scope the chart vocabulary and the order in which planets, signs, houses, aspects, patterns, and synthesis are taught; it is not scientific validation.
- NCGR-PAA Level II CurriculumNCGR-PAA Level II Curriculum, Part 1 sections I–IV and Part 2 chart synthesis requirements, pp. 1–5A professional astrology curriculum covering astronomy, chart calculation, house systems, dignity, rulership, transits, progressions, and synthesis; it records practice standards rather than empirical proof.
- OpenFate Astrology Editorial Synthesis DisclosureEditorial Methodology stable sections #editorial-principles, #editorial-workflow, #editorial-ai, and #editorial-contextOpenFate disclosure for page-specific symbolic prose: each meaning is editorial synthesis of interpretive tradition, not scientific evidence. Public curricula scope vocabulary; ephemeris and time sources validate only calculations.
- Swiss Ephemeris Programmer’s ManualSwiss Ephemeris Programmer’s Manual 2.10, sections 1 “programming steps”, 3 “Planetary Positions”, 8 “Date and time conversion”, 14 “House cusp calculation”, 15 “House position”, and 16 “Sidereal time”The Swiss Ephemeris programming manual used for geocentric ecliptic positions, Julian-day inputs, house cusps, and Ascendant/MC calculations. Numerical positions are reproducible outputs; symbolic meanings are a separate tradition.
- IANA Time Zone Databasetz database theory.html, section “Scope of the tz database” and historical civil-time transitionsThe maintained source for current and historical civil-time offsets and daylight-saving transitions; it provides timekeeping facts, not astrological interpretation.
- US Naval Observatory: Sidereal TimeUSNO “Sidereal Time”, sections “Apparent Sidereal Time” and input notes for date, UT, and longitudeAn official service distinguishing Greenwich and local mean and apparent sidereal time and their required UT1 input.
- OpenFate Calculation and AI Validation DisclosureCalculation Validation stable sections #calculation-interpretation, #verification-controls, and #methodology-limitsOpenFate’s public calculation-first method separates normalized birth inputs, reproducible chart results, AI-assisted explanation, verification, and limits. It does not list every Western-astrology setting; check the current feature or support page for available calculations.