| Geyser | 1999-04-26 |
|---|---|
| Castle | 0814 E, 2344 E |
| Great Fountain | 0318 E, 1533 E |
| Values for Old Faithful Area | 1999-04-26 |
|---|---|
| Astronomical Twilight Begin | 04:29 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:49 |
| Sunrise | 06:21 |
| Sunset | 20:20 |
| Civil Twilight End | 20:52 |
| Nautical Twilight End | 21:30 |
| Astronomical Twilight End | 22:13 |
| Moon Illumination | 82.93% |