| Geyser | 1940-07-16 |
|---|---|
| Ledge | 1900 |
| Values for Old Faithful Area | 1940-07-16 |
|---|---|
| Astronomical Twilight Begin | 02:37 |
| Nautical Twilight Begin | 03:33 |
| Civil Twilight Begin | 04:18 |
| Sunrise | 04:53 |
| Sunset | 20:04 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:25 |
| Astronomical Twilight End | 22:20 |
| Moon Illumination | 89.25% |