| Geyser | 1949-08-20 |
|---|---|
| Ledge | 1200 |
| Values for Old Faithful Area | 1949-08-20 |
|---|---|
| Astronomical Twilight Begin | 03:41 |
| Nautical Twilight Begin | 04:23 |
| Civil Twilight Begin | 05:00 |
| Sunrise | 05:31 |
| Sunset | 19:21 |
| Civil Twilight End | 19:52 |
| Nautical Twilight End | 20:30 |
| Astronomical Twilight End | 21:11 |
| Moon Illumination | 18.6% |