| Geyser | 1977-05-30 |
|---|---|
| Whirligig | 1800 |
| Values for Old Faithful Area | 1977-05-30 |
|---|---|
| Astronomical Twilight Begin | 03:23 |
| Nautical Twilight Begin | 04:20 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:42 |
| Sunset | 20:59 |
| Civil Twilight End | 21:34 |
| Nautical Twilight End | 22:20 |
| Astronomical Twilight End | 23:17 |
| Moon Illumination | 90.02% |