| Geyser | 1991-08-17 |
|---|---|
| Echinus | 1055, 1200, 1305, 1405 maj, 1515, 1610 |
| Morning | 0153, 0533, 0913, 1253, 1654, 2044 |
| Values for Old Faithful Area | 1991-08-17 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:18 |
| Civil Twilight Begin | 05:57 |
| Sunrise | 06:28 |
| Sunset | 20:26 |
| Civil Twilight End | 20:57 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:18 |
| Moon Illumination | 50.33% |