| Geyser | 1966-08-29 |
|---|---|
| Chinese Spring | 2045 |
| Ebony | 1159 |
| Echinus | 0800 A, 0850, 0945, 1043, 1135, 1230, 1322, 1417, 1511 |
| Emerald Spring | 1800 |
| Harding | 0930 |
| Ledge | 1500 |
| Steamboat | 0820-0900 |
| Values for Old Faithful Area | 1966-08-29 |
|---|---|
| Astronomical Twilight Begin | 04:56 |
| Nautical Twilight Begin | 05:35 |
| Civil Twilight Begin | 06:12 |
| Sunrise | 06:42 |
| Sunset | 20:06 |
| Civil Twilight End | 20:36 |
| Nautical Twilight End | 21:12 |
| Astronomical Twilight End | 21:51 |
| Moon Illumination | 97.17% |