| Geyser | 1999-03-29 |
|---|---|
| Great Fountain | 0918 E, 1918 E |
| Values for Old Faithful Area | 1999-03-29 |
|---|---|
| Astronomical Twilight Begin | 04:30 |
| Nautical Twilight Begin | 05:05 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:09 |
| Sunset | 18:46 |
| Civil Twilight End | 19:15 |
| Nautical Twilight End | 19:50 |
| Astronomical Twilight End | 20:26 |
| Moon Illumination | 93.11% |