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55 lines
1.5 KiB
Markdown
55 lines
1.5 KiB
Markdown
[**moon-sighting v1.1.1**](../README.md)
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***
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[moon-sighting](../README.md) / MoonIlluminationResult
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# Interface: MoonIlluminationResult
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Defined in: [types.ts:47](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L47)
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Moon illumination from getMoonIllumination().
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Computed via Meeus Ch. 47/48 (no kernel required).
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Accuracy: fraction ~0.5%, phase fraction ~0.003.
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## Properties
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### angle
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> **angle**: `number`
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Defined in: [types.ts:59](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L59)
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Position angle of the midpoint of the bright limb, measured eastward from
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the north celestial pole, in radians. Matches the suncalc convention.
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***
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### fraction
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> **fraction**: `number`
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Defined in: [types.ts:49](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L49)
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Illuminated fraction of the Moon disk, 0 (new moon) to 1 (full moon)
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***
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### isWaxing
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> **isWaxing**: `boolean`
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Defined in: [types.ts:61](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L61)
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True while elongation is increasing (new moon toward full moon)
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***
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### phase
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> **phase**: `number`
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Defined in: [types.ts:54](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L54)
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Phase cycle fraction in [0, 1):
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0 = new moon, 0.25 = first quarter, 0.5 = full moon, 0.75 = last quarter
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