| Geyser | 1959-05-15 |
|---|---|
| Morning | 1015 |
| Values for Old Faithful Area | 1959-05-15 |
|---|---|
| Astronomical Twilight Begin | 02:50 |
| Nautical Twilight Begin | 03:39 |
| Civil Twilight Begin | 04:22 |
| Sunrise | 04:56 |
| Sunset | 19:43 |
| Civil Twilight End | 20:16 |
| Nautical Twilight End | 20:59 |
| Astronomical Twilight End | 21:49 |
| Moon Illumination | 44.24% |