| Values for Old Faithful Area | 1999-09-04 |
|---|---|
| Astronomical Twilight Begin | 05:06 |
| Nautical Twilight Begin | 05:43 |
| Civil Twilight Begin | 06:19 |
| Sunrise | 06:49 |
| Sunset | 19:55 |
| Civil Twilight End | 20:25 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:38 |
| Moon Illumination | 35.23% |