| Values for Old Faithful Area | 1976-08-13 |
|---|---|
| Astronomical Twilight Begin | 04:30 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:52 |
| Sunrise | 06:24 |
| Sunset | 20:31 |
| Civil Twilight End | 21:03 |
| Nautical Twilight End | 21:42 |
| Astronomical Twilight End | 22:25 |
| Moon Illumination | 89.43% |