| Geyser | 1999-11-26 |
|---|---|
| Grand | 0253 E, 1253 E, 2211 E |
| Great Fountain | 0629 E, 1526 E |
| Values for Old Faithful Area | 1999-11-26 |
|---|---|
| Astronomical Twilight Begin | 05:50 |
| Nautical Twilight Begin | 06:25 |
| Civil Twilight Begin | 07:01 |
| Sunrise | 07:33 |
| Sunset | 16:47 |
| Civil Twilight End | 17:19 |
| Nautical Twilight End | 17:55 |
| Astronomical Twilight End | 18:30 |
| Moon Illumination | 87.12% |