| Geyser | 1999-01-05 |
|---|---|
| Great Fountain | 0403 E, 1433 E |
| Values for Old Faithful Area | 1999-01-05 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:50 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:57 |
| Civil Twilight End | 17:30 |
| Nautical Twilight End | 18:07 |
| Astronomical Twilight End | 18:42 |
| Moon Illumination | 87.92% |