| Geyser | 1936-08-15 |
|---|---|
| Colloidal Pool | 0000 A |
| Values for Old Faithful Area | 1936-08-15 |
|---|---|
| Astronomical Twilight Begin | 03:33 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 04:54 |
| Sunrise | 05:26 |
| Sunset | 19:29 |
| Civil Twilight End | 20:00 |
| Nautical Twilight End | 20:39 |
| Astronomical Twilight End | 21:22 |
| Moon Illumination | 3.6% |