| Geyser | 1999-03-19 |
|---|---|
| Great Fountain | 0258 E, 1318 E, 2303 E |
| Values for Old Faithful Area | 1999-03-19 |
|---|---|
| Astronomical Twilight Begin | 04:50 |
| Nautical Twilight Begin | 05:25 |
| Civil Twilight Begin | 05:59 |
| Sunrise | 06:28 |
| Sunset | 18:33 |
| Civil Twilight End | 19:02 |
| Nautical Twilight End | 19:36 |
| Astronomical Twilight End | 20:11 |
| Moon Illumination | 3.23% |