| Geyser | 1973-09-23 |
|---|---|
| Blue | 1800 |
| Echinus | 1025, 1128, 1229, 1434, 1534, 1637, 1740 |
| Fearless | 0945 |
| Little Whirligig | 1800 |
| Orby | 0945 ie |
| Palpitator Spring | 0945 |
| Values for Old Faithful Area | 1973-09-23 |
|---|---|
| Astronomical Twilight Begin | 05:34 |
| Nautical Twilight Begin | 06:08 |
| Civil Twilight Begin | 06:42 |
| Sunrise | 07:11 |
| Sunset | 19:19 |
| Civil Twilight End | 19:48 |
| Nautical Twilight End | 20:22 |
| Astronomical Twilight End | 20:57 |
| Moon Illumination | 13.41% |