expert contour
This page exposes separate computational and historical profiles rather than one generic lunar calendar. Similar counts are not treated as proof of a shared tradition; unresolved conventions remain closed.
Moon Technology Constitution V1
Astronomical authority is fixed first. Only then may the selected tradition derive its permitted values. Modern OmenHall, Ptolemy, tithi, and moonrise-based lunar days are never merged into a pseudo-historical system.
astronomical-calculation · none
Authority: Astronomy Engine 2.1.19; a Moon-specific JPL regression acceptance is required before external release.
Algorithm: Geocentric coordinates, distance, phase angle, illumination, exact quarter events; local horizon only with explicit coordinates.
Boundary: No symbolic interpretation may mutate astronomical facts.
omenhall-authored · none
Authority: OmenHall-authored system; not a historical tradition.
Algorithm: The actual time interval between two consecutive exact new moons is divided into 30 equal temporal stages.
Boundary: Symbols and practices are labeled modern/authored; they are not called traditional lunar days.
modern-published-school · explicit-observer
Authority: Published procedure: new moon → first local moonrise → successive local moonrises → next new moon.
Algorithm: Boundaries depend on observer coordinates; day 30 can be short or absent.
Boundary: Only the calculation profile is enabled. Copyrighted book interpretations are not reproduced; antiquity claims are not treated as established provenance.
historical-source-bound · none
Authority: Tetrabiblos I: qualities of four lunation sections, Moon domicile in Cancer, exaltation in Taurus and depression in Scorpio.
Algorithm: Tropical sign + phase-angle quarter; only rules attested by the selected source profile.
Boundary: Historical astrological doctrine is presented as historical doctrine, not scientifically proven lunar influence; modern Moon-sign personality meanings are not mixed in.
source-bound-calculation · none
Authority: A tithi is defined by a 12° increase of lunar longitude relative to solar longitude; 30 tithis form a lunation.
Algorithm: Current tithi, paksha, and exact angular boundaries are calculated. Sunrise civil-day assignment is not yet presented as a complete Panchāṅga.
Boundary: Nakshatra, yoga, and named karanas remain fail-closed until an explicit nirayana/ayanāṃśa authority and procedure are fixed.
research-boundary · none
Authority: Requires a separate sidereal/ayanāṃśa profile.
Algorithm: Not activated until the reference frame is source-fixed.
Boundary: Do not merge with Arabic manāzil or Chinese xiù.
research-boundary · none
Authority: Indian nakshatra, Arabic manāzil, and Chinese xiù are maintained as three independent corpora.
Algorithm: No generic 28-mansion table is created without source-bound reconciliation.
Boundary: A similar number of stations does not make the technologies identical.
Provider: astronomy-engine 2.1.19
Frame: geocentric-true-ecliptic-of-date
Input UTC: 2026-09-24T04:30:12.878Z
Authority: moon-authority:oh1-6d7712c9078e437f
Longitude: 330.589587°
Latitude: 0.089377°
Distance: 390374 km
Motion: 12.7355°/day
This technical passport explains the calculation provenance; it is not an astrological interpretation by itself.
Astronomical authority now
149.425728° · 93.1%
Tropical pisces 0.589587° · OmenHall stage 14 · 44.191% of actual lunation
Ptolemy Book I
heat
Lunar dignity: none
Panchāṅga tithi foundation
shukla 13
Tithi 13/30 · 149.425728°
Nakshatra / yoga / named karana remain fail-closed.
Choose a calculation profile. The same UTC instant remains the physical authority; only the permitted derivation changes. Coordinates are requested only for a technology whose procedure actually depends on local Moon rises.
The workbench does not request browser geolocation or convert a timezone into coordinates. It is an expert calculation surface, not evidence of physical effects claimed by astrological doctrines.
Astronomy Engine 2.1.19 · NASA Moon phase reference · JPL Horizons external verification target · Ptolemy, Tetrabiblos I · Pavel Globa, Lunnaya astrologiya (2006) procedure boundary · Government of India Positional Astronomy Centre / Rashtriya Panchang · Explanatory Supplement to the Astronomical Almanac.