| Values for Old Faithful Area | 1973-09-07 |
|---|---|
| Astronomical Twilight Begin | 05:11 |
| Nautical Twilight Begin | 05:48 |
| Civil Twilight Begin | 06:23 |
| Sunrise | 06:53 |
| Sunset | 19:49 |
| Civil Twilight End | 20:18 |
| Nautical Twilight End | 20:54 |
| Astronomical Twilight End | 21:31 |
| Moon Illumination | 73.71% |