| Values for Old Faithful Area | 1979-08-27 |
|---|---|
| Astronomical Twilight Begin | 04:53 |
| Nautical Twilight Begin | 05:32 |
| Civil Twilight Begin | 06:09 |
| Sunrise | 06:39 |
| Sunset | 20:09 |
| Civil Twilight End | 20:40 |
| Nautical Twilight End | 21:17 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 17.62% |