| Geyser | 2000-01-19 |
|---|---|
| Grand | 0026 E, 1202 E, 2332 E |
| Great Fountain | 1406 E |
| Values for Old Faithful Area | 2000-01-19 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:46 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:53 |
| Sunset | 17:14 |
| Civil Twilight End | 17:45 |
| Nautical Twilight End | 18:21 |
| Astronomical Twilight End | 18:56 |
| Moon Illumination | 94.66% |