| Geyser | 2000-05-10 |
|---|---|
| Echinus | 1845 |
| Giant | 1854 ie |
| Values for Old Faithful Area | 2000-05-10 |
|---|---|
| Astronomical Twilight Begin | 03:57 |
| Nautical Twilight Begin | 04:45 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:00 |
| Sunset | 20:38 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:53 |
| Astronomical Twilight End | 22:41 |
| Moon Illumination | 43.49% |