| Geyser | 1977-08-26 |
|---|---|
| Echinus | 0927 |
| Giantess | 0000-2359, 0000 |
| Harding | 2131 |
| Little Whirligig | 1435, 1553 |
| UNNG-NBK-8 | 1200 |
| Values for Old Faithful Area | 1977-08-26 |
|---|---|
| Astronomical Twilight Begin | 04:52 |
| Nautical Twilight Begin | 05:31 |
| Civil Twilight Begin | 06:08 |
| Sunrise | 06:39 |
| Sunset | 20:10 |
| Civil Twilight End | 20:41 |
| Nautical Twilight End | 21:18 |
| Astronomical Twilight End | 21:57 |
| Moon Illumination | 91.44% |