| Geyser | 1984-04-12 |
|---|---|
| Steamboat | 1800 |
| Values for Old Faithful Area | 1984-04-12 |
|---|---|
| Astronomical Twilight Begin | 03:58 |
| Nautical Twilight Begin | 04:37 |
| Civil Twilight Begin | 05:13 |
| Sunrise | 05:43 |
| Sunset | 19:04 |
| Civil Twilight End | 19:34 |
| Nautical Twilight End | 20:10 |
| Astronomical Twilight End | 20:49 |
| Moon Illumination | 82.81% |