| Values for Old Faithful Area | 1981-08-26 |
|---|---|
| Astronomical Twilight Begin | 04:52 |
| Nautical Twilight Begin | 05:32 |
| Civil Twilight Begin | 06:08 |
| Sunrise | 06:39 |
| Sunset | 20:10 |
| Civil Twilight End | 20:41 |
| Nautical Twilight End | 21:17 |
| Astronomical Twilight End | 21:57 |
| Moon Illumination | 13.07% |