| Geyser | 1999-02-14 |
|---|---|
| Great Fountain | 0503 E, 1628 E |
| Values for Old Faithful Area | 1999-02-14 |
|---|---|
| Astronomical Twilight Begin | 05:47 |
| Nautical Twilight Begin | 06:20 |
| Civil Twilight Begin | 06:54 |
| Sunrise | 07:24 |
| Sunset | 17:50 |
| Civil Twilight End | 18:20 |
| Nautical Twilight End | 18:54 |
| Astronomical Twilight End | 19:27 |
| Moon Illumination | 4.6% |