| Geyser | 1999-03-13 |
|---|---|
| Great Fountain | 0133 E, 1143 E, 2143 E |
| Values for Old Faithful Area | 1999-03-13 |
|---|---|
| Astronomical Twilight Begin | 05:02 |
| Nautical Twilight Begin | 05:36 |
| Civil Twilight Begin | 06:10 |
| Sunrise | 06:39 |
| Sunset | 18:26 |
| Civil Twilight End | 18:55 |
| Nautical Twilight End | 19:28 |
| Astronomical Twilight End | 20:03 |
| Moon Illumination | 22.75% |