| Values for Old Faithful Area | 1978-08-16 |
|---|---|
| Astronomical Twilight Begin | 04:34 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:27 |
| Sunset | 20:27 |
| Civil Twilight End | 20:59 |
| Nautical Twilight End | 21:37 |
| Astronomical Twilight End | 22:20 |
| Moon Illumination | 92.9% |