| Values for Old Faithful Area | 1999-08-13 |
|---|---|
| Astronomical Twilight Begin | 04:29 |
| Nautical Twilight Begin | 05:12 |
| Civil Twilight Begin | 05:52 |
| Sunrise | 06:23 |
| Sunset | 20:32 |
| Civil Twilight End | 21:04 |
| Nautical Twilight End | 21:43 |
| Astronomical Twilight End | 22:26 |
| Moon Illumination | 3.95% |