| Values for Old Faithful Area | 1973-09-29 |
|---|---|
| Astronomical Twilight Begin | 05:41 |
| Nautical Twilight Begin | 06:16 |
| Civil Twilight Begin | 06:50 |
| Sunrise | 07:18 |
| Sunset | 19:08 |
| Civil Twilight End | 19:37 |
| Nautical Twilight End | 20:10 |
| Astronomical Twilight End | 20:45 |
| Moon Illumination | 7.8% |