| Geyser | 1991-11-24 |
|---|---|
| Fantail | 1991-10-20 0000-1992-05-01 2359 |
| Values for Old Faithful Area | 1991-11-24 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:58 |
| Sunrise | 07:30 |
| Sunset | 16:49 |
| Civil Twilight End | 17:21 |
| Nautical Twilight End | 17:56 |
| Astronomical Twilight End | 18:31 |
| Moon Illumination | 92.5% |