| Values for Old Faithful Area | 1979-09-28 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:48 |
| Sunrise | 07:17 |
| Sunset | 19:10 |
| Civil Twilight End | 19:39 |
| Nautical Twilight End | 20:13 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 40% |