| Geyser | 1973-05-18 |
|---|---|
| Beehive | 1840 |
| Ledge | 0730 A |
| Old Faithful | 0853, 0939, 1034, 1139, 1305, 1345, 1506, 1558, 1716, 1807, 1927 |
| Values for Old Faithful Area | 1973-05-18 |
|---|---|
| Astronomical Twilight Begin | 03:43 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:52 |
| Sunset | 20:47 |
| Civil Twilight End | 21:21 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:56 |
| Moon Illumination | 99.02% |