| Values for Old Faithful Area | 1977-04-26 |
|---|---|
| Astronomical Twilight Begin | 04:28 |
| Nautical Twilight Begin | 05:10 |
| Civil Twilight Begin | 05:49 |
| Sunrise | 06:20 |
| Sunset | 20:21 |
| Civil Twilight End | 20:52 |
| Nautical Twilight End | 21:31 |
| Astronomical Twilight End | 22:13 |
| Moon Illumination | 46.39% |