| Values for Old Faithful Area | 1979-08-10 |
|---|---|
| Astronomical Twilight Begin | 04:23 |
| Nautical Twilight Begin | 05:08 |
| Civil Twilight Begin | 05:47 |
| Sunrise | 06:20 |
| Sunset | 20:37 |
| Civil Twilight End | 21:09 |
| Nautical Twilight End | 21:49 |
| Astronomical Twilight End | 22:33 |
| Moon Illumination | 93.34% |