| Geyser | 1999-03-16 |
|---|---|
| Great Fountain | 0238 E, 1933 E |
| Values for Old Faithful Area | 1999-03-16 |
|---|---|
| Astronomical Twilight Begin | 04:56 |
| Nautical Twilight Begin | 05:31 |
| Civil Twilight Begin | 06:04 |
| Sunrise | 06:33 |
| Sunset | 18:30 |
| Civil Twilight End | 18:59 |
| Nautical Twilight End | 19:32 |
| Astronomical Twilight End | 20:07 |
| Moon Illumination | 2.95% |