| Geyser | 1980-09-08 |
|---|---|
| Echinus | 1223, 1421 |
| Values for Old Faithful Area | 1980-09-08 |
|---|---|
| Astronomical Twilight Begin | 05:13 |
| Nautical Twilight Begin | 05:50 |
| Civil Twilight Begin | 06:25 |
| Sunrise | 06:54 |
| Sunset | 19:46 |
| Civil Twilight End | 20:16 |
| Nautical Twilight End | 20:51 |
| Astronomical Twilight End | 21:28 |
| Moon Illumination | 1.27% |