| Geyser | 1990-05-10 |
|---|---|
| Giantess | 0730 |
| Values for Old Faithful Area | 1990-05-10 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:46 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 06:01 |
| Sunset | 20:37 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:52 |
| Astronomical Twilight End | 22:40 |
| Moon Illumination | 99.83% |