| Geyser | 1973-10-17 |
|---|---|
| Dark Cavern | 1800 |
| Ledge | 1229 |
| Values for Old Faithful Area | 1973-10-17 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:38 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:41 |
| Sunset | 18:36 |
| Civil Twilight End | 19:05 |
| Nautical Twilight End | 19:39 |
| Astronomical Twilight End | 20:12 |
| Moon Illumination | 68.97% |