| Geyser | 1999-01-24 |
|---|---|
| Great Fountain | 0853 E, 2003 E |
| Values for Old Faithful Area | 1999-01-24 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:42 |
| Civil Twilight Begin | 07:18 |
| Sunrise | 07:49 |
| Sunset | 17:21 |
| Civil Twilight End | 17:52 |
| Nautical Twilight End | 18:27 |
| Astronomical Twilight End | 19:02 |
| Moon Illumination | 44.29% |