| Geyser | 1984-05-18 |
|---|---|
| Echinus | 0850, 0939 |
| Values for Old Faithful Area | 1984-05-18 |
|---|---|
| Astronomical Twilight Begin | 03:42 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:17 |
| Sunrise | 05:51 |
| Sunset | 20:47 |
| Civil Twilight End | 21:21 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:56 |
| Moon Illumination | 88.95% |