| Geyser | 1999-02-26 |
|---|---|
| Great Fountain | 0713 E, 2103 E |
| Values for Old Faithful Area | 1999-02-26 |
|---|---|
| Astronomical Twilight Begin | 05:29 |
| Nautical Twilight Begin | 06:02 |
| Civil Twilight Begin | 06:36 |
| Sunrise | 07:05 |
| Sunset | 18:06 |
| Civil Twilight End | 18:35 |
| Nautical Twilight End | 19:09 |
| Astronomical Twilight End | 19:43 |
| Moon Illumination | 82.75% |