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expert contour

The real technology of a natal chart

A natal chart begins not with sign interpretation but with the authority of the recorded birth data. This laboratory shows what is exact, what remains stable across a time interval, and which historical rules a selected profile is permitted to use.

STAR_PROFILE_NATAL_TECHNOLOGY_CONSTITUTION_V1

One birth record — several strictly separated technologies

OmenHall first fixes calendar, civil time, timezone, place, and uncertainty. The astronomical layer is calculated next. Only then may a selected school derive its houses, aspects, dignities, or Lots. Unknown birth time is never replaced by a hidden noon.

Astronomical Birth Sky

non-divinatory

astronomical-calculation · customer runtime ON

Birth time
exact instant or explicit interval; never invented noon
Calendar
explicit Gregorian/Julian; historical-local fail-closed
Astronomy
provider-backed geocentric ecliptic-of-date
Zodiac
none-required
Planets
sun-moon-mercury-venus-mars-jupiter-saturn-uranus-neptune-pluto
Lunar nodes
disabled-until-separate-verified-node-provider
Houses
none
Aspects
angular geometry only
Lots
none

Authority: Physical calculation layer before astrological doctrine.

Firewall: psychological causation · fate claim · historical-school label

OmenHall Modern Western Natal V3

live

omenhall-authored · customer runtime ON

Birth time
exact; approximate center plus optional uncertainty envelope; unknown full-day envelope
Calendar
Gregorian or explicit Julian conversion; historical-local unresolved
Astronomy
geocentric
Zodiac
TROPICAL_EQUINOX_30_DEGREE_ZODIAC_V1
Planets
10-body modern set
Lunar nodes
disabled-no-node-runtime-v1
Houses
Placidus / Equal / Whole Sign as explicit user-selected modern options
Aspects
OMENHALL_MODERN_ASPECT_RULESET_V1
Lots
none-in-base-profile

Authority: Modern OmenHall-authored profile; never presented as one universal historical astrology.

Firewall: historical masquerade · invented birth time · unverified lunar nodes · AI mutation of calculated facts

Unknown-Time Natal Envelope

live

omenhall-authored · customer runtime ON

Birth time
entire recorded local civil date interval
Calendar
explicit computable calendar only
Astronomy
geocentric interval
Zodiac
tropical coordinate envelope
Planets
10-body modern set
Lunar nodes
disabled
Houses
Ascendant/MC/exact houses not promoted
Aspects
sampled modern-aspect stability labelled non-continuous proof
Lots
none

Authority: Shows only what remains stable or possible across the full recorded birth date.

Firewall: invented noon · single Ascendant · single exact house placement · false exact Moon sign across ingress

Birth-Time Uncertainty Profile

live

omenhall-authored · customer runtime ON

Birth time
user-declared +/- minute interval
Calendar
same recorded calendar authority as the birth evidence
Astronomy
geocentric interval with geometry sampling
Zodiac
tropical
Planets
10-body modern set
Lunar nodes
disabled
Houses
possible ASC/MC signs and possible houses; never one exact geometry
Aspects
sampled stability
Lots
none

Authority: Propagates the user-declared time uncertainty through the chart instead of hiding false precision.

Firewall: single exact angle from approximate time · silent default uncertainty width

Ptolemy Genethlialogy — research

research-only

historical-research · customer runtime OFF

Birth time
source-specific; includes historical ascending-degree correction research
Calendar
historical input authority must be explicit
Astronomy
traditional seven-planet subset
Zodiac
tropical source profile
Planets
Sun Moon Mercury Venus Mars Jupiter Saturn
Lunar nodes
not-imported-from-modern-profile
Houses
Book III procedure not yet frozen
Aspects
source-bound configurations; no modern orb backfill
Lots
source-witness-specific; formula not universalized

Authority: The Book I foundation exists, but a full Book III natal runtime requires direct procedural collation.

Firewall: outer planets · modern psychological archetypes · modern orb table · mortality/medical deterministic customer judgments

Valens Hellenistic Natal — research

research-only

historical-research · customer runtime OFF

Birth time
exact historical chart authority required
Calendar
historical calendar/civil-time authority required
Astronomy
traditional seven-planet subset
Zodiac
source profile to be frozen
Planets
traditional
Lunar nodes
source-specific
Houses
Whole Sign Places candidate; direct corpus closure required
Aspects
source-bound sign configurations
Lots
Fortune/Daimon formulas must be profile-owned and directly collated

Authority: Places, sect, lots, and timing stay off until direct collation of the selected corpus.

Firewall: Placidus default · outer planets · modern aspects under Hellenistic label

Lilly 1647 Nativities — research

research-only

historical-research · customer runtime OFF

Birth time
source-bound early-modern nativity procedure
Calendar
historical England/local civil-time authority required per case
Astronomy
traditional
Zodiac
source profile to be frozen
Planets
traditional
Lunar nodes
source-specific
Houses
Book III direct collation pending
Aspects
early-modern source-bound
Lots
source-bound

Authority: The primary digital witness is registered, but the nativity procedure has not yet been promoted to a customer calculator.

Firewall: outer planets · generic Renaissance mash-up · modern psychological rules

Rectification Laboratory — hypothesis

research-only

omenhall-authored · customer runtime OFF

Birth time
candidate interval comparison only
Calendar
requires fixed birth-date/civil-time authority first
Astronomy
candidate charts
Zodiac
technology-dependent
Planets
technology-dependent
Lunar nodes
technology-dependent
Houses
candidate-only
Aspects
candidate-only
Lots
technology-dependent

Authority: Rectification may rank hypotheses but never presents a derived time as independently proven fact.

Firewall: your true time is X · silent event-fit certainty · overwrite of recorded birth evidence

Nirayana / Jyotiṣa Natal — unresolved

fail-closed

reference-frame-boundary · customer runtime OFF

Birth time
not active
Calendar
not active
Astronomy
unresolved
Zodiac
UNRESOLVED_AYANAMSA
Planets
unresolved graha set
Lunar nodes
unresolved
Houses
unresolved
Aspects
unresolved drishti doctrine
Lots
not-applicable-until-profile-freeze

Authority: The words sidereal/Vedic are insufficient: a selected ayanāṃśa, graha, bhāva, dṛṣṭi, and source corpus are required.

Firewall: tropical relabel · generic Vedic switch

Birth Authority Chain

recorded date/time → calendar authority → civil-time/timezone resolution → UTC interval/instant → location authority → astronomical calculation → technology-owned derivation → immutable natal authority → interpretation

For pre-1970 dates an IANA timezone is treated as a computational aid rather than conclusive historical evidence of local civil time. A historical-local calendar remains fail-closed until an explicit conversion profile exists.

Live exact / approximate / unknown-time laboratory

Use the same server-calculated Birth Chart engine. Unknown time creates an interval across the full recorded local date, approximate time propagates the declared +/- range, and exact time permits precise angles and houses only when input authority is sufficient.

verifiable profile

Build Birth Chart

Birth evidence, calendar, and civil time are fixed first; then the server calculates the sky. Exact time can yield exact geometry, approximate time propagates through a declared ± interval, and unknown time becomes a full-day envelope without invented 12:00.

who is this for

Whose Birth Chart is this

Your data comes from your account. Another person can be used once or saved separately. Source data is fixed before interpretation.

Search uses OmenHall's local GeoNames cities500 copy, CC BY 4.0. No metered external geocoder is called for each search. GeoNames

Precise place coordinates (advanced)

Coordinates are needed for exact houses, angles, and synastry overlays. They are not fetched again for every calculation: OmenHall stores the resolved place in the Person Passport. The local GeoNames gazetteer supplies coordinates and IANA timezone without a paid API; manual entry remains a fallback for rare places.

Without sign-in, data is not saved: you can use a one-time profile. After sign-in, Me and Saved Person become available.

Birth Authority Gate

What these birth data can actually support

coordinates missing
Planetsrange

Calculated as a full-local-date interval, never with invented noon.

Aspectsrange

Interval mode shows sampled stability rather than false continuous proof.

ASC / MCneeds data

An exact point requires exact time + coordinates.

Housesneeds data

Unknown time never receives one invented house.

Birth evidence packet

Name

not provided

Date

Time

Unknown time

Place

Timezone

Coordinates

not provided

Temporal house system; polar geometry fails closed instead of silently switching systems.

One-time profiles are never stored automatically.

The full recorded local-date interval is calculated: stable/possible placements are shown, but no single Ascendant, MC, or exact house is promoted as fact.

An unknown-time envelope needs the birth date and the place's IANA timezone; no clock time is needed or invented.

Natal authority

After calculation, this area shows either an exact chart or interval authority. OmenHall does not insert demo placements as personal data before calculation.

Birth date

Needed for Sun, Moon, and planet positions.

Store as a private profile field.

Birth time

Needed for houses, Ascendant, MC, and precise Moon.

If time is unknown, the answer must honestly switch to unknown-time mode.

Birth place

Needed for timezone, coordinates, and houses.

Do not show publicly or use for ads.

Profile name

Needed for archive convenience: me, partner, child, project persona.

The name may be a nickname.

Source and calculation boundaries

Astronomy Engine 2.1.19 · OmenHall/Swiss Ephemeris cross-engine fixtures · IANA tzdb historical-boundary policy · explicit Julian/Gregorian conversion · Ptolemy Tetrabiblos research witness · Vettius Valens research corpus · William Lilly 1647 Wellcome witness.

Ptolemy/Valens/Lilly/Jyotiṣa are not activated as customer natal calculators until their procedures are directly closed. Lunar nodes are also not claimed until a separately verified True/Mean Node provider exists.