| Values for Old Faithful Area | 1988-07-27 |
|---|---|
| Astronomical Twilight Begin | 03:58 |
| Nautical Twilight Begin | 04:48 |
| Civil Twilight Begin | 05:31 |
| Sunrise | 06:05 |
| Sunset | 20:54 |
| Civil Twilight End | 21:28 |
| Nautical Twilight End | 22:10 |
| Astronomical Twilight End | 23:00 |
| Moon Illumination | 94.82% |