| Values for Old Faithful Area | 1999-08-28 |
|---|---|
| Astronomical Twilight Begin | 04:55 |
| Nautical Twilight Begin | 05:34 |
| Civil Twilight Begin | 06:10 |
| Sunrise | 06:41 |
| Sunset | 20:07 |
| Civil Twilight End | 20:38 |
| Nautical Twilight End | 21:14 |
| Astronomical Twilight End | 21:53 |
| Moon Illumination | 98.11% |