| Geyser | 1999-11-24 |
|---|---|
| Grand | 0714 E, 2102 E |
| Great Fountain | 0456 E, 1725 E |
| Values for Old Faithful Area | 1999-11-24 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:58 |
| Sunrise | 07:30 |
| Sunset | 16:48 |
| Civil Twilight End | 17:21 |
| Nautical Twilight End | 17:56 |
| Astronomical Twilight End | 18:31 |
| Moon Illumination | 98.51% |