| Geyser | 1999-02-05 |
|---|---|
| Great Fountain | 0733 E, 1818 E |
| Spectacle | 0844 ie |
| Values for Old Faithful Area | 1999-02-05 |
|---|---|
| Astronomical Twilight Begin | 05:57 |
| Nautical Twilight Begin | 06:31 |
| Civil Twilight Begin | 07:06 |
| Sunrise | 07:36 |
| Sunset | 17:37 |
| Civil Twilight End | 18:08 |
| Nautical Twilight End | 18:42 |
| Astronomical Twilight End | 19:16 |
| Moon Illumination | 78.74% |