| Values for Old Faithful Area | 1977-05-11 |
|---|---|
| Astronomical Twilight Begin | 03:56 |
| Nautical Twilight Begin | 04:44 |
| Civil Twilight Begin | 05:26 |
| Sunrise | 05:59 |
| Sunset | 20:39 |
| Civil Twilight End | 21:12 |
| Nautical Twilight End | 21:54 |
| Astronomical Twilight End | 22:42 |
| Moon Illumination | 38.87% |