| Geyser | 1999-05-02 |
|---|---|
| Castle | 0059 E, 0738 E, 2326 E |
| Great Fountain | 0738 E, 1923 E |
| Values for Old Faithful Area | 1999-05-02 |
|---|---|
| Astronomical Twilight Begin | 04:16 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:12 |
| Sunset | 20:28 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:40 |
| Astronomical Twilight End | 22:24 |
| Moon Illumination | 97.6% |