| Geyser | 1959-08-15 |
|---|---|
| Morning | 0930 |
| Values for Old Faithful Area | 1959-08-15 |
|---|---|
| Astronomical Twilight Begin | 03:32 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 04:54 |
| Sunrise | 05:25 |
| Sunset | 19:29 |
| Civil Twilight End | 20:01 |
| Nautical Twilight End | 20:40 |
| Astronomical Twilight End | 21:23 |
| Moon Illumination | 86.87% |