| Geyser | 2000-02-12 |
|---|---|
| Grand | 1111 E, 2205 E |
| Great Fountain | 0437 E, 1435 E, 1822 E |
| Values for Old Faithful Area | 2000-02-12 |
|---|---|
| Astronomical Twilight Begin | 05:49 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:57 |
| Sunrise | 07:27 |
| Sunset | 17:47 |
| Civil Twilight End | 18:17 |
| Nautical Twilight End | 18:51 |
| Astronomical Twilight End | 19:25 |
| Moon Illumination | 42.41% |