| Values for Old Faithful Area | 1979-09-27 |
|---|---|
| Astronomical Twilight Begin | 05:38 |
| Nautical Twilight Begin | 06:13 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:16 |
| Sunset | 19:12 |
| Civil Twilight End | 19:41 |
| Nautical Twilight End | 20:15 |
| Astronomical Twilight End | 20:49 |
| Moon Illumination | 29.98% |