| Geyser | 1986-04-11 |
|---|---|
| Fantail | 0945 ie, 1746 |
| Values for Old Faithful Area | 1986-04-11 |
|---|---|
| Astronomical Twilight Begin | 04:01 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:16 |
| Sunrise | 05:46 |
| Sunset | 19:02 |
| Civil Twilight End | 19:32 |
| Nautical Twilight End | 20:08 |
| Astronomical Twilight End | 20:47 |
| Moon Illumination | 3.89% |