| Geyser | 1989-09-29 |
|---|---|
| Blue | 1200 |
| Colloidal Pool | 1200 |
| Congress Pool | 1200 |
| Whirligig | 1205, 1232 |
| Values for Old Faithful Area | 1989-09-29 |
|---|---|
| Astronomical Twilight Begin | 05:42 |
| Nautical Twilight Begin | 06:16 |
| Civil Twilight Begin | 06:50 |
| Sunrise | 07:19 |
| Sunset | 19:07 |
| Civil Twilight End | 19:36 |
| Nautical Twilight End | 20:10 |
| Astronomical Twilight End | 20:44 |
| Moon Illumination | 0.39% |