| Values for Old Faithful Area | 1976-09-10 |
|---|---|
| Astronomical Twilight Begin | 05:16 |
| Nautical Twilight Begin | 05:52 |
| Civil Twilight Begin | 06:27 |
| Sunrise | 06:56 |
| Sunset | 19:43 |
| Civil Twilight End | 20:12 |
| Nautical Twilight End | 20:47 |
| Astronomical Twilight End | 21:23 |
| Moon Illumination | 97.22% |