| Geyser | 1999-11-29 |
|---|---|
| Grand | 0744 E, 1814 E |
| Great Fountain | 0437 E, 1757 E |
| Values for Old Faithful Area | 1999-11-29 |
|---|---|
| Astronomical Twilight Begin | 05:53 |
| Nautical Twilight Begin | 06:28 |
| Civil Twilight Begin | 07:04 |
| Sunrise | 07:37 |
| Sunset | 16:46 |
| Civil Twilight End | 17:18 |
| Nautical Twilight End | 17:54 |
| Astronomical Twilight End | 18:29 |
| Moon Illumination | 57.42% |