| Values for Old Faithful Area | 1981-09-06 |
|---|---|
| Astronomical Twilight Begin | 05:09 |
| Nautical Twilight Begin | 05:47 |
| Civil Twilight Begin | 06:22 |
| Sunrise | 06:52 |
| Sunset | 19:51 |
| Civil Twilight End | 20:20 |
| Nautical Twilight End | 20:56 |
| Astronomical Twilight End | 21:33 |
| Moon Illumination | 47.06% |