| Geyser | 1977-06-12 |
|---|---|
| Echinus | 0830 |
| Valentine | 1505 |
| Values for Old Faithful Area | 1977-06-12 |
|---|---|
| Astronomical Twilight Begin | 03:11 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:08 |
| Civil Twilight End | 21:44 |
| Nautical Twilight End | 22:33 |
| Astronomical Twilight End | 23:35 |
| Moon Illumination | 17.38% |