| Geyser | 1999-11-06 |
|---|---|
| Grand | 0108 E, 1347 E |
| Great Fountain | 0802 E, 1816 E |
| Values for Old Faithful Area | 1999-11-06 |
|---|---|
| Astronomical Twilight Begin | 05:28 |
| Nautical Twilight Begin | 06:02 |
| Civil Twilight Begin | 06:36 |
| Sunrise | 07:07 |
| Sunset | 17:06 |
| Civil Twilight End | 17:37 |
| Nautical Twilight End | 18:11 |
| Astronomical Twilight End | 18:45 |
| Moon Illumination | 3.31% |