| Geyser | 1983-07-27 |
|---|---|
| Bear Den | 0940 |
| Echinus | 0850, 1050 min, 1133 |
| Little Brother | 1447, 1503, 1552, 1607, 1644, 1659, 1715 |
| Three Crater | 1512, 1622, 1730 |
| Values for Old Faithful Area | 1983-07-27 |
|---|---|
| Astronomical Twilight Begin | 03:57 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:04 |
| Sunset | 20:55 |
| Civil Twilight End | 21:28 |
| Nautical Twilight End | 22:12 |
| Astronomical Twilight End | 23:02 |
| Moon Illumination | 95.36% |