| Geyser | 1999-01-22 |
|---|---|
| Great Fountain | 0153 E, 1138 E, 2358 E |
| Values for Old Faithful Area | 1999-01-22 |
|---|---|
| Astronomical Twilight Begin | 06:09 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:19 |
| Sunrise | 07:51 |
| Sunset | 17:18 |
| Civil Twilight End | 17:49 |
| Nautical Twilight End | 18:25 |
| Astronomical Twilight End | 19:00 |
| Moon Illumination | 23.17% |