| Values for Old Faithful Area | 1990-08-04 |
|---|---|
| Astronomical Twilight Begin | 04:12 |
| Nautical Twilight Begin | 04:59 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:13 |
| Sunset | 20:45 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:59 |
| Astronomical Twilight End | 22:45 |
| Moon Illumination | 94.33% |