| Geyser | 1964-05-23 |
|---|---|
| Steamboat | 1800 |
| Values for Old Faithful Area | 1964-05-23 |
|---|---|
| Astronomical Twilight Begin | 02:34 |
| Nautical Twilight Begin | 03:27 |
| Civil Twilight Begin | 04:12 |
| Sunrise | 04:47 |
| Sunset | 19:52 |
| Civil Twilight End | 20:27 |
| Nautical Twilight End | 21:12 |
| Astronomical Twilight End | 22:05 |
| Moon Illumination | 91.29% |