| Geyser | 1977-06-24 |
|---|---|
| Echinus | 1029, 1131 |
| Values for Old Faithful Area | 1977-06-24 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:14 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:39 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 46.94% |