| Values for Old Faithful Area | 1976-08-10 |
|---|---|
| Astronomical Twilight Begin | 04:24 |
| Nautical Twilight Begin | 05:09 |
| Civil Twilight Begin | 05:48 |
| Sunrise | 06:20 |
| Sunset | 20:36 |
| Civil Twilight End | 21:08 |
| Nautical Twilight End | 21:47 |
| Astronomical Twilight End | 22:32 |
| Moon Illumination | 99.92% |