| Values for Old Faithful Area | 1975-05-09 |
|---|---|
| Astronomical Twilight Begin | 04:01 |
| Nautical Twilight Begin | 04:48 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:03 |
| Sunset | 20:36 |
| Civil Twilight End | 21:09 |
| Nautical Twilight End | 21:50 |
| Astronomical Twilight End | 22:37 |
| Moon Illumination | 4.3% |