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Geyser1991-05-20
Whistle 1991-05-12 0000-1991-05-24 0000
Values for Old Faithful Area1991-05-20
Astronomical Twilight Begin03:40
Nautical Twilight Begin04:32
Civil Twilight Begin05:16
Sunrise05:50
Sunset20:48
Civil Twilight End21:23
Nautical Twilight End22:07
Astronomical Twilight End22:59
Moon Illumination43.72%

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