| Geyser | 1971-02-11 |
|---|---|
| Lone Star | 1745 |
| Values for Old Faithful Area | 1971-02-11 |
|---|---|
| Astronomical Twilight Begin | 05:51 |
| Nautical Twilight Begin | 06:25 |
| Civil Twilight Begin | 06:59 |
| Sunrise | 07:29 |
| Sunset | 17:45 |
| Civil Twilight End | 18:15 |
| Nautical Twilight End | 18:50 |
| Astronomical Twilight End | 19:23 |
| Moon Illumination | 99.14% |