| Geyser | 1999-03-26 |
|---|---|
| Great Fountain | 0043 E, 1058 E |
| Values for Old Faithful Area | 1999-03-26 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:46 |
| Sunrise | 06:15 |
| Sunset | 18:42 |
| Civil Twilight End | 19:11 |
| Nautical Twilight End | 19:46 |
| Astronomical Twilight End | 20:21 |
| Moon Illumination | 69.83% |