| Values for Old Faithful Area | 1968-08-18 |
|---|---|
| Astronomical Twilight Begin | 04:39 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:58 |
| Sunrise | 06:30 |
| Sunset | 20:23 |
| Civil Twilight End | 20:55 |
| Nautical Twilight End | 21:33 |
| Astronomical Twilight End | 22:14 |
| Moon Illumination | 30.09% |