| Geyser | 1999-03-09 |
|---|---|
| Great Fountain | 0728 E, 1908 E |
| Values for Old Faithful Area | 1999-03-09 |
|---|---|
| Astronomical Twilight Begin | 05:09 |
| Nautical Twilight Begin | 05:43 |
| Civil Twilight Begin | 06:17 |
| Sunrise | 06:46 |
| Sunset | 18:21 |
| Civil Twilight End | 18:50 |
| Nautical Twilight End | 19:23 |
| Astronomical Twilight End | 19:57 |
| Moon Illumination | 60.16% |