| Values for Old Faithful Area | 1977-05-09 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:48 |
| Civil Twilight Begin | 05:29 |
| Sunrise | 06:02 |
| Sunset | 20:36 |
| Civil Twilight End | 21:09 |
| Nautical Twilight End | 21:51 |
| Astronomical Twilight End | 22:38 |
| Moon Illumination | 60.12% |