| Values for Old Faithful Area | 1987-05-02 |
|---|---|
| Astronomical Twilight Begin | 04:16 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:12 |
| Sunset | 20:28 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:39 |
| Astronomical Twilight End | 22:24 |
| Moon Illumination | 16.55% |