| Values for Old Faithful Area | 1975-10-11 |
|---|---|
| Astronomical Twilight Begin | 05:56 |
| Nautical Twilight Begin | 06:30 |
| Civil Twilight Begin | 07:03 |
| Sunrise | 07:33 |
| Sunset | 18:47 |
| Civil Twilight End | 19:16 |
| Nautical Twilight End | 19:49 |
| Astronomical Twilight End | 20:23 |
| Moon Illumination | 41.85% |