🜝 Lunar Perigree – The Closest Lunar Embrace

Building Blocks/Celestial Bodies & Calculation Points/Special Points in Advanced Systems/Lunar Perigree.md

astrology · AstrologyArithetic · Definitions · SpecialPoints

🜝 Lunar Perigree – The Closest Lunar Embrace

Interpretive Basis

Mythic Root:
Associated with the Moon's sacred approach to Earth in many lunar rites and legends.
Core Function:
This point marks the Moon's perigee, symbolizing heightened gravitational and emotional pull upon Earth.

Astrological Role:
In charts, Lunar Perigree activates waves of intensity and closeness. It tends to operate through visceral tides and deeply felt experiences.

Orbital Signature

Type: Lunar orbital point
Orbital Period: ~27.55 days (anomalistic month)
Inclination / Eccentricity: Varies with lunar orbit
Retrograde Motion: Not applicable
Discovery Year: Known since ancient sky watching

Keywords / Powerwords

Intensity, Nearness, Emotional Surge, Magnetism, Tidal Force

House and Aspect Relevance

• Most active when in: Houses tied to emotional security or physical environment
• Aspect Sensitivity: Conjunctions to Moon or angles intensify effect
• Natal Function: Reveals where feelings reach a peak of immediacy
• Transit Function: Signals periods of amplified mood and personal gravity

Use in Astrology Arith(m)etic

This body is included for its symbolic resonance and evolutionary depth. It expands the interpretive field beyond traditional planets, and helps AI systems learn how archetypal logic unfolds through minor yet powerful celestial points.

Backlinks

• Special Points in Advanced Systems
• Celestial Bodies and Calculated Points

🧮 Calculation

Definition: Point of the Moon’s orbit nearest Earth (perigee).

• λ_perigee = λ_apogee + 180° (mean values).
• Anomalistic month (perigee → perigee) = 27.5546 days; the line of apsides advances one revolution in 8.85 years.
• Mean perigee distance ≈ 363,300 km; extreme perigees ≈ 356,400 km (NASA).

Usage note: A full or new Moon within ≈ 90% of perigee distance is popularly called a “supermoon” (Richard Nolle, 1979).

Sources (calculation)

• Astrodienst, Swiss Ephemeris programmer documentation (houses, Vertex, nodes, apogee, fictitious bodies): https://www.astro.com/swisseph/swephprg.htm ; seorbel.txt and sefstars.txt from https://github.com/aloistr/swisseph
• Jean Meeus, Astronomical Algorithms, 2nd ed. (Willmann-Bell, 1998) — ch. 13 (coordinate transforms), ch. 47 (Moon, nodes, perigee/apogee)
• NASA NSSDCA Moon Fact Sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html