| Geyser | 1963-04-23 |
|---|---|
| Steamboat | 0000 |
| Values for Old Faithful Area | 1963-04-23 |
|---|---|
| Astronomical Twilight Begin | 03:36 |
| Nautical Twilight Begin | 04:17 |
| Civil Twilight Begin | 04:55 |
| Sunrise | 05:26 |
| Sunset | 19:16 |
| Civil Twilight End | 19:47 |
| Nautical Twilight End | 20:25 |
| Astronomical Twilight End | 21:07 |
| Moon Illumination | 0.5% |