moon-sighting/.github/wiki/api/interfaces/TimeScales.md
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[**moon-sighting v1.1.1**](../README.md)
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[moon-sighting](../README.md) / TimeScales
# Interface: TimeScales
Defined in: [types.ts:67](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L67)
All relevant time scale values for a single moment
## Properties
### deltaAT
> **deltaAT**: `number`
Defined in: [types.ts:80](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L80)
TAI - UTC in seconds (leap seconds count)
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### deltaT
> **deltaT**: `number`
Defined in: [types.ts:78](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L78)
TT - UT1 in seconds (delta-T)
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### jdTDB
> **jdTDB**: `number`
Defined in: [types.ts:74](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L74)
Julian Date in Barycentric Dynamical Time (used by JPL ephemerides)
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### jdTT
> **jdTT**: `number`
Defined in: [types.ts:72](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L72)
Julian Date in Terrestrial Time (TT = TAI + 32.184s)
***
### jdUT1
> **jdUT1**: `number`
Defined in: [types.ts:76](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L76)
Julian Date in UT1 (Earth rotation time)
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### jdUTC
> **jdUTC**: `number`
Defined in: [types.ts:70](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L70)
Julian Date in UTC
***
### utc
> **utc**: `Date`
Defined in: [types.ts:68](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L68)