| Geyser | 1964-05-15 |
|---|---|
| Steamboat | 0900 |
| Values for Old Faithful Area | 1964-05-15 |
|---|---|
| Astronomical Twilight Begin | 02:48 |
| Nautical Twilight Begin | 03:38 |
| Civil Twilight Begin | 04:21 |
| Sunrise | 04:55 |
| Sunset | 19:44 |
| Civil Twilight End | 20:17 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:50 |
| Moon Illumination | 16.51% |