| Geyser | 1959-08-19 |
|---|---|
| Morning | 1145, 1415 |
| Values for Old Faithful Area | 1959-08-19 |
|---|---|
| Astronomical Twilight Begin | 03:39 |
| Nautical Twilight Begin | 04:21 |
| Civil Twilight Begin | 04:59 |
| Sunrise | 05:30 |
| Sunset | 19:23 |
| Civil Twilight End | 19:54 |
| Nautical Twilight End | 20:32 |
| Astronomical Twilight End | 21:14 |
| Moon Illumination | 99.33% |