| Values for Old Faithful Area | 1999-10-12 |
|---|---|
| Astronomical Twilight Begin | 05:58 |
| Nautical Twilight Begin | 06:31 |
| Civil Twilight Begin | 07:05 |
| Sunrise | 07:34 |
| Sunset | 18:45 |
| Civil Twilight End | 19:14 |
| Nautical Twilight End | 19:47 |
| Astronomical Twilight End | 20:21 |
| Moon Illumination | 7.35% |