| Geyser | 2000-02-13 |
|---|---|
| Grand | 0950 E, 1947 E |
| Values for Old Faithful Area | 2000-02-13 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:22 |
| Civil Twilight Begin | 06:56 |
| Sunrise | 07:26 |
| Sunset | 17:48 |
| Civil Twilight End | 18:18 |
| Nautical Twilight End | 18:52 |
| Astronomical Twilight End | 19:26 |
| Moon Illumination | 53.61% |