| Geyser | 1999-02-02 |
|---|---|
| Great Fountain | 0033 E, 0953 E, 2118 E |
| Values for Old Faithful Area | 1999-02-02 |
|---|---|
| Astronomical Twilight Begin | 06:01 |
| Nautical Twilight Begin | 06:35 |
| Civil Twilight Begin | 07:09 |
| Sunrise | 07:40 |
| Sunset | 17:33 |
| Civil Twilight End | 18:04 |
| Nautical Twilight End | 18:38 |
| Astronomical Twilight End | 19:13 |
| Moon Illumination | 96.97% |