| Geyser | 1980-09-23 |
|---|---|
| Echinus | 1151, 1442, 1511, 1534 |
| Little Whirligig | 1800 |
| Values for Old Faithful Area | 1980-09-23 |
|---|---|
| Astronomical Twilight Begin | 05:34 |
| Nautical Twilight Begin | 06:09 |
| Civil Twilight Begin | 06:43 |
| Sunrise | 07:12 |
| Sunset | 19:18 |
| Civil Twilight End | 19:47 |
| Nautical Twilight End | 20:21 |
| Astronomical Twilight End | 20:56 |
| Moon Illumination | 97.65% |