| Values for Old Faithful Area | 1997-09-14 |
|---|---|
| Astronomical Twilight Begin | 05:21 |
| Nautical Twilight Begin | 05:57 |
| Civil Twilight Begin | 06:32 |
| Sunrise | 07:01 |
| Sunset | 19:35 |
| Civil Twilight End | 20:05 |
| Nautical Twilight End | 20:39 |
| Astronomical Twilight End | 21:15 |
| Moon Illumination | 90.5% |