| Geyser | 1973-04-25 |
|---|---|
| Echinus | 1800 |
| Values for Old Faithful Area | 1973-04-25 |
|---|---|
| Astronomical Twilight Begin | 03:30 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 04:51 |
| Sunrise | 05:22 |
| Sunset | 19:20 |
| Civil Twilight End | 19:51 |
| Nautical Twilight End | 20:29 |
| Astronomical Twilight End | 21:11 |
| Moon Illumination | 54.38% |