| Values for Old Faithful Area | 1971-10-09 |
|---|---|
| Astronomical Twilight Begin | 05:54 |
| Nautical Twilight Begin | 06:27 |
| Civil Twilight Begin | 07:01 |
| Sunrise | 07:30 |
| Sunset | 18:50 |
| Civil Twilight End | 19:19 |
| Nautical Twilight End | 19:53 |
| Astronomical Twilight End | 20:27 |
| Moon Illumination | 70.89% |