| Geyser | 1976-12-17 |
|---|---|
| Castle | 1344 ie |
| Dome | 0000-2359 |
| Values for Old Faithful Area | 1976-12-17 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:54 |
| Sunset | 16:45 |
| Civil Twilight End | 17:18 |
| Nautical Twilight End | 17:55 |
| Astronomical Twilight End | 18:30 |
| Moon Illumination | 19.49% |