| Values for Old Faithful Area | 1981-09-03 |
|---|---|
| Astronomical Twilight Begin | 05:05 |
| Nautical Twilight Begin | 05:43 |
| Civil Twilight Begin | 06:18 |
| Sunrise | 06:48 |
| Sunset | 19:56 |
| Civil Twilight End | 20:26 |
| Nautical Twilight End | 21:02 |
| Astronomical Twilight End | 21:39 |
| Moon Illumination | 20.57% |