| Values for Old Faithful Area | 1976-09-27 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:16 |
| Sunset | 19:11 |
| Civil Twilight End | 19:40 |
| Nautical Twilight End | 20:14 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 16.36% |