| Geyser | 1977-07-26 |
|---|---|
| Constant | 1653 |
| Echinus | 1020, 1220, 1425 |
| Little Whirligig | 1620 |
| Values for Old Faithful Area | 1977-07-26 |
|---|---|
| Astronomical Twilight Begin | 03:56 |
| Nautical Twilight Begin | 04:46 |
| Civil Twilight Begin | 05:29 |
| Sunrise | 06:03 |
| Sunset | 20:55 |
| Civil Twilight End | 21:29 |
| Nautical Twilight End | 22:12 |
| Astronomical Twilight End | 23:03 |
| Moon Illumination | 76.71% |