| Values for Old Faithful Area | 1977-05-02 |
|---|---|
| Astronomical Twilight Begin | 04:15 |
| Nautical Twilight Begin | 04:59 |
| Civil Twilight Begin | 05:39 |
| Sunrise | 06:11 |
| Sunset | 20:28 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:40 |
| Astronomical Twilight End | 22:25 |
| Moon Illumination | 97.49% |