| Values for Old Faithful Area | 1981-09-16 |
|---|---|
| Astronomical Twilight Begin | 05:24 |
| Nautical Twilight Begin | 06:00 |
| Civil Twilight Begin | 06:34 |
| Sunrise | 07:03 |
| Sunset | 19:32 |
| Civil Twilight End | 20:01 |
| Nautical Twilight End | 20:35 |
| Astronomical Twilight End | 21:11 |
| Moon Illumination | 93.93% |