| Values for Old Faithful Area | 1973-08-17 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:19 |
| Civil Twilight Begin | 05:57 |
| Sunrise | 06:28 |
| Sunset | 20:25 |
| Civil Twilight End | 20:57 |
| Nautical Twilight End | 21:35 |
| Astronomical Twilight End | 22:17 |
| Moon Illumination | 89.76% |