| Geyser | 1987-07-16 |
|---|---|
| Echinus | 1253 maj, 1615 maj |
| Values for Old Faithful Area | 1987-07-16 |
|---|---|
| Astronomical Twilight Begin | 03:37 |
| Nautical Twilight Begin | 04:32 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:53 |
| Sunset | 21:05 |
| Civil Twilight End | 21:40 |
| Nautical Twilight End | 22:25 |
| Astronomical Twilight End | 23:21 |
| Moon Illumination | 66.95% |