Interface: MoonIlluminationResult

Defined in: types.ts:47

Moon illumination from getMoonIllumination(). Computed via Meeus Ch. 47/48 (no kernel required). Accuracy: fraction ~0.5%, phase fraction ~0.003.

Properties

angle: number

Defined in: types.ts:59

Position angle of the midpoint of the bright limb, measured eastward from the north celestial pole, in radians. Matches the suncalc convention.

fraction: number

Defined in: types.ts:49

Illuminated fraction of the Moon disk, 0 (new moon) to 1 (full moon)

isWaxing: boolean

Defined in: types.ts:61

True while elongation is increasing (new moon toward full moon)

phase: number

Defined in: types.ts:54

Phase cycle fraction in [0, 1): 0 = new moon, 0.25 = first quarter, 0.5 = full moon, 0.75 = last quarter