| Geyser | 1977-06-04 |
|---|---|
| Echinus | 0833, 0938, 1519 |
| Values for Old Faithful Area | 1977-06-04 |
|---|---|
| Astronomical Twilight Begin | 03:17 |
| Nautical Twilight Begin | 04:16 |
| Civil Twilight Begin | 05:04 |
| Sunrise | 05:40 |
| Sunset | 21:03 |
| Civil Twilight End | 21:39 |
| Nautical Twilight End | 22:26 |
| Astronomical Twilight End | 23:25 |
| Moon Illumination | 91.47% |