| Geyser | 1999-03-03 |
|---|---|
| Great Fountain | 0628 E, 1803 E |
| Values for Old Faithful Area | 1999-03-03 |
|---|---|
| Astronomical Twilight Begin | 05:20 |
| Nautical Twilight Begin | 05:54 |
| Civil Twilight Begin | 06:28 |
| Sunrise | 06:57 |
| Sunset | 18:13 |
| Civil Twilight End | 18:42 |
| Nautical Twilight End | 19:16 |
| Astronomical Twilight End | 19:49 |
| Moon Illumination | 98.93% |