| Geyser | 1999-11-03 |
|---|---|
| Grand | 0656 E, 1820 E |
| Great Fountain | 0027 E, 0902 E, 1920 E |
| Values for Old Faithful Area | 1999-11-03 |
|---|---|
| Astronomical Twilight Begin | 05:24 |
| Nautical Twilight Begin | 05:58 |
| Civil Twilight Begin | 06:32 |
| Sunrise | 07:03 |
| Sunset | 17:10 |
| Civil Twilight End | 17:40 |
| Nautical Twilight End | 18:15 |
| Astronomical Twilight End | 18:49 |
| Moon Illumination | 21.94% |