| Geyser | 1997-12-07 |
|---|---|
| Castle | 0315 E, 1420 E |
| Values for Old Faithful Area | 1997-12-07 |
|---|---|
| Astronomical Twilight Begin | 06:01 |
| Nautical Twilight Begin | 06:36 |
| Civil Twilight Begin | 07:13 |
| Sunrise | 07:46 |
| Sunset | 16:43 |
| Civil Twilight End | 17:16 |
| Nautical Twilight End | 17:53 |
| Astronomical Twilight End | 18:28 |
| Moon Illumination | 50.43% |