| Geyser | 1964-05-13 |
|---|---|
| Steamboat | 0850-2100 |
| Values for Old Faithful Area | 1964-05-13 |
|---|---|
| Astronomical Twilight Begin | 02:52 |
| Nautical Twilight Begin | 03:41 |
| Civil Twilight Begin | 04:23 |
| Sunrise | 04:57 |
| Sunset | 19:41 |
| Civil Twilight End | 20:15 |
| Nautical Twilight End | 20:57 |
| Astronomical Twilight End | 21:46 |
| Moon Illumination | 3.01% |