| Geyser | 1983-05-18 |
|---|---|
| Giantess | 1943 |
| Values for Old Faithful Area | 1983-05-18 |
|---|---|
| Astronomical Twilight Begin | 03:44 |
| Nautical Twilight Begin | 04:35 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:52 |
| Sunset | 20:46 |
| Civil Twilight End | 21:20 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:55 |
| Moon Illumination | 34.88% |