| Geyser | 1999-05-11 |
|---|---|
| Castle | 0341 E, 1832 E |
| Great Fountain | 0113 E, 1258 E, 2343 E |
| Values for Old Faithful Area | 1999-05-11 |
|---|---|
| Astronomical Twilight Begin | 03:57 |
| Nautical Twilight Begin | 04:45 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:00 |
| Sunset | 20:38 |
| Civil Twilight End | 21:12 |
| Nautical Twilight End | 21:53 |
| Astronomical Twilight End | 22:41 |
| Moon Illumination | 24.11% |