| Geyser | 1987-07-29 |
|---|---|
| Echinus | 1028 maj, 1445 maj |
| Values for Old Faithful Area | 1987-07-29 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:50 |
| Civil Twilight Begin | 05:33 |
| Sunrise | 06:06 |
| Sunset | 20:52 |
| Civil Twilight End | 21:26 |
| Nautical Twilight End | 22:09 |
| Astronomical Twilight End | 22:58 |
| Moon Illumination | 10.17% |