| Geyser | 1959-08-17 |
|---|---|
| Morning | 2345 |
| Values for Old Faithful Area | 1959-08-17 |
|---|---|
| Astronomical Twilight Begin | 03:35 |
| Nautical Twilight Begin | 04:18 |
| Civil Twilight Begin | 04:56 |
| Sunrise | 05:27 |
| Sunset | 19:26 |
| Civil Twilight End | 19:58 |
| Nautical Twilight End | 20:36 |
| Astronomical Twilight End | 21:18 |
| Moon Illumination | 98.03% |