| Geyser | 2000-01-22 |
|---|---|
| Grand | 0029 E, 1147 E, 2144 E |
| Great Fountain | 0906 E, 2037 E |
| Values for Old Faithful Area | 2000-01-22 |
|---|---|
| Astronomical Twilight Begin | 06:09 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:19 |
| Sunrise | 07:51 |
| Sunset | 17:17 |
| Civil Twilight End | 17:49 |
| Nautical Twilight End | 18:25 |
| Astronomical Twilight End | 18:59 |
| Moon Illumination | 98.26% |