| Geyser | 1977-08-05 |
|---|---|
| Constant | 1040 |
| Echinus | 1204 |
| Little Whirligig | 1030 ie, 1455 |
| Valentine | 1440 |
| Vixen | 1800 |
| Values for Old Faithful Area | 1977-08-05 |
|---|---|
| Astronomical Twilight Begin | 04:15 |
| Nautical Twilight Begin | 05:01 |
| Civil Twilight Begin | 05:42 |
| Sunrise | 06:14 |
| Sunset | 20:43 |
| Civil Twilight End | 21:16 |
| Nautical Twilight End | 21:57 |
| Astronomical Twilight End | 22:43 |
| Moon Illumination | 65.43% |