| Geyser | 2000-01-16 |
|---|---|
| Grand | 0644 E, 1620 E |
| Great Fountain | 0648 E, 1637 E |
| Values for Old Faithful Area | 2000-01-16 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:23 |
| Sunrise | 07:55 |
| Sunset | 17:10 |
| Civil Twilight End | 17:42 |
| Nautical Twilight End | 18:18 |
| Astronomical Twilight End | 18:53 |
| Moon Illumination | 69% |