| Geyser | 1999-01-11 |
|---|---|
| Great Fountain | 1103 E, 2033 E |
| Values for Old Faithful Area | 1999-01-11 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:25 |
| Sunrise | 07:58 |
| Sunset | 17:04 |
| Civil Twilight End | 17:37 |
| Nautical Twilight End | 18:13 |
| Astronomical Twilight End | 18:48 |
| Moon Illumination | 34.34% |