Interface BirthInput

A resolved birth instant. Use resolveBirth from @zodiacs/engine/geo when starting from a local wall time and IANA timezone.

interface BirthInput {
    deltaT?: number;
    flags?: readonly ChartFlag[];
    houseSystem?: HouseSystem;
    latitude?: number;
    longitude?: number;
    timeKnown?: boolean;
    timeScale?: TimeScaleName;
    utc: DateInput;
}

Index

Properties

deltaT? flags? houseSystem? latitude? longitude? timeKnown? timeScale? utc

Properties

`Optional`deltaT

deltaT?: number

Fix ΔT (TT − UT1) at this many seconds instead of the engine's time basis; UT1 still comes from the instant. The chart then reports deltaT.model "pinned". Finite, at most 1e10 in size.

`Optional`flags

flags?: readonly ChartFlag[]

Up to 64 known flags. Duplicate claims normalize to one value. Time flags are caller assertions; no-time/polar-fallback echoes must match calculation. natalChart returns canonical semantic flags, not the raw submitted array.

`Optional`houseSystem

houseSystem?: HouseSystem

`Optional`latitude

latitude?: number

`Optional`longitude

longitude?: number

`Optional`timeKnown

timeKnown?: boolean

False means utc is a caller-supplied reference instant and suppresses angles/houses. It does not establish a UTC-noon or local-noon convention by itself.

`Optional`timeScale

timeScale?: TimeScaleName

"utc" (default), "ut1" or "tt" (docs/time.md).

utc

utc: DateInput

The instant, on the scale timeScale names: UTC by default, and UT1 or TT when timeScale says so. The field keeps its name on every scale, because receipts record it under that name (docs/time.md).