| Geyser | 2000-02-09 |
|---|---|
| Grand | 0411 E, 1617 E |
| Great Fountain | 0440 E, 1552 E |
| Values for Old Faithful Area | 2000-02-09 |
|---|---|
| Astronomical Twilight Begin | 05:53 |
| Nautical Twilight Begin | 06:27 |
| Civil Twilight Begin | 07:01 |
| Sunrise | 07:32 |
| Sunset | 17:42 |
| Civil Twilight End | 18:13 |
| Nautical Twilight End | 18:47 |
| Astronomical Twilight End | 19:21 |
| Moon Illumination | 14.01% |