| Geyser | 1984-05-10 |
|---|---|
| Crater Spring | 0000 |
| Values for Old Faithful Area | 1984-05-10 |
|---|---|
| Astronomical Twilight Begin | 03:58 |
| Nautical Twilight Begin | 04:45 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:00 |
| Sunset | 20:38 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:53 |
| Astronomical Twilight End | 22:41 |
| Moon Illumination | 69.79% |