| Geyser | 2000-02-27 |
|---|---|
| Grand | 0347 E |
| Great Fountain | 0544 E, 1558 E |
| Values for Old Faithful Area | 2000-02-27 |
|---|---|
| Astronomical Twilight Begin | 05:27 |
| Nautical Twilight Begin | 06:01 |
| Civil Twilight Begin | 06:35 |
| Sunrise | 07:04 |
| Sunset | 18:07 |
| Civil Twilight End | 18:36 |
| Nautical Twilight End | 19:10 |
| Astronomical Twilight End | 19:44 |
| Moon Illumination | 48.96% |