| Values for Old Faithful Area | 1987-04-26 |
|---|---|
| Astronomical Twilight Begin | 04:29 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:21 |
| Sunset | 20:20 |
| Civil Twilight End | 20:52 |
| Nautical Twilight End | 21:30 |
| Astronomical Twilight End | 22:12 |
| Moon Illumination | 3.63% |