| Geyser | 1999-02-16 |
|---|---|
| Great Fountain | 0003 E, 0733 E, 1853 E |
| Values for Old Faithful Area | 1999-02-16 |
|---|---|
| Astronomical Twilight Begin | 05:44 |
| Nautical Twilight Begin | 06:18 |
| Civil Twilight Begin | 06:52 |
| Sunrise | 07:21 |
| Sunset | 17:53 |
| Civil Twilight End | 18:22 |
| Nautical Twilight End | 18:56 |
| Astronomical Twilight End | 19:30 |
| Moon Illumination | 0% |