| Geyser | 1999-05-03 |
|---|---|
| Castle | 1432 E |
| Great Fountain | 0953 E, 2103 E |
| Values for Old Faithful Area | 1999-05-03 |
|---|---|
| Astronomical Twilight Begin | 04:13 |
| Nautical Twilight Begin | 04:58 |
| Civil Twilight Begin | 05:38 |
| Sunrise | 06:10 |
| Sunset | 20:29 |
| Civil Twilight End | 21:01 |
| Nautical Twilight End | 21:41 |
| Astronomical Twilight End | 22:26 |
| Moon Illumination | 93.86% |