| Geyser | 1971-05-10 |
|---|---|
| Castle | 0855 |
| Old Faithful | 1031 short, 1139 long, 1344 long, 1513 short, 1555 long |
| Values for Old Faithful Area | 1971-05-10 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 06:01 |
| Sunset | 20:37 |
| Civil Twilight End | 21:10 |
| Nautical Twilight End | 21:52 |
| Astronomical Twilight End | 22:39 |
| Moon Illumination | 99.95% |