| Values for Old Faithful Area | 1973-04-07 |
|---|---|
| Astronomical Twilight Begin | 04:10 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:23 |
| Sunrise | 05:52 |
| Sunset | 18:57 |
| Civil Twilight End | 19:27 |
| Nautical Twilight End | 20:03 |
| Astronomical Twilight End | 20:40 |
| Moon Illumination | 18.95% |