| Geyser | 1991-11-08 |
|---|---|
| Fantail | 1991-10-20 0000-1992-05-01 2359 |
| Values for Old Faithful Area | 1991-11-08 |
|---|---|
| Astronomical Twilight Begin | 05:30 |
| Nautical Twilight Begin | 06:04 |
| Civil Twilight Begin | 06:39 |
| Sunrise | 07:09 |
| Sunset | 17:04 |
| Civil Twilight End | 17:34 |
| Nautical Twilight End | 18:09 |
| Astronomical Twilight End | 18:43 |
| Moon Illumination | 3.37% |