| Geyser | 1983-09-06 |
|---|---|
| Echinus | 1437 |
| Values for Old Faithful Area | 1983-09-06 |
|---|---|
| Astronomical Twilight Begin | 05:09 |
| Nautical Twilight Begin | 05:46 |
| Civil Twilight Begin | 06:21 |
| Sunrise | 06:51 |
| Sunset | 19:51 |
| Civil Twilight End | 20:21 |
| Nautical Twilight End | 20:56 |
| Astronomical Twilight End | 21:34 |
| Moon Illumination | 1.12% |