| Values for Old Faithful Area | 1999-08-12 |
|---|---|
| Astronomical Twilight Begin | 04:27 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:22 |
| Sunset | 20:34 |
| Civil Twilight End | 21:05 |
| Nautical Twilight End | 21:45 |
| Astronomical Twilight End | 22:29 |
| Moon Illumination | 0.8% |