| Geyser | 1986-04-07 |
|---|---|
| Fantail | 0830, 1736 |
| Values for Old Faithful Area | 1986-04-07 |
|---|---|
| Astronomical Twilight Begin | 04:10 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:23 |
| Sunrise | 05:53 |
| Sunset | 18:57 |
| Civil Twilight End | 19:27 |
| Nautical Twilight End | 20:02 |
| Astronomical Twilight End | 20:40 |
| Moon Illumination | 3.86% |