| Geyser | 1991-11-07 |
|---|---|
| Fantail | 1991-10-20 0000-1992-05-01 2359 |
| Values for Old Faithful Area | 1991-11-07 |
|---|---|
| Astronomical Twilight Begin | 05:29 |
| Nautical Twilight Begin | 06:03 |
| Civil Twilight Begin | 06:37 |
| Sunrise | 07:08 |
| Sunset | 17:05 |
| Civil Twilight End | 17:36 |
| Nautical Twilight End | 18:10 |
| Astronomical Twilight End | 18:44 |
| Moon Illumination | 0.71% |