| Geyser | 1983-05-15 |
|---|---|
| Harding | 1200 |
| Steamboat | 2130 |
| Values for Old Faithful Area | 1983-05-15 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:22 |
| Sunrise | 05:55 |
| Sunset | 20:43 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:59 |
| Astronomical Twilight End | 22:49 |
| Moon Illumination | 7.69% |