| Geyser | 1981-06-07 |
|---|---|
| Harding | 0013 |
| Whirligig | 0922 |
| Values for Old Faithful Area | 1981-06-07 |
|---|---|
| Astronomical Twilight Begin | 03:14 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:39 |
| Sunset | 21:05 |
| Civil Twilight End | 21:41 |
| Nautical Twilight End | 22:29 |
| Astronomical Twilight End | 23:29 |
| Moon Illumination | 27.79% |