| Geyser | 1986-05-15 |
|---|---|
| Fantail | 1812 |
| Values for Old Faithful Area | 1986-05-15 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:21 |
| Sunrise | 05:55 |
| Sunset | 20:43 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 22:00 |
| Astronomical Twilight End | 22:50 |
| Moon Illumination | 32.42% |