| Geyser | 2000-01-29 |
|---|---|
| Grand | 0314 E, 1502 E |
| Great Fountain | 0827 E, 1955 E |
| Values for Old Faithful Area | 2000-01-29 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:39 |
| Civil Twilight Begin | 07:14 |
| Sunrise | 07:45 |
| Sunset | 17:27 |
| Civil Twilight End | 17:58 |
| Nautical Twilight End | 18:33 |
| Astronomical Twilight End | 19:07 |
| Moon Illumination | 40.93% |