| Geyser | 1999-03-27 |
|---|---|
| Great Fountain | 0028 E, 1458 E |
| Values for Old Faithful Area | 1999-03-27 |
|---|---|
| Astronomical Twilight Begin | 04:34 |
| Nautical Twilight Begin | 05:09 |
| Civil Twilight Begin | 05:44 |
| Sunrise | 06:13 |
| Sunset | 18:43 |
| Civil Twilight End | 19:13 |
| Nautical Twilight End | 19:47 |
| Astronomical Twilight End | 20:23 |
| Moon Illumination | 79.14% |