| Geyser | 1973-04-26 |
|---|---|
| Ledge | 2000 |
| Valentine | 1140 |
| Values for Old Faithful Area | 1973-04-26 |
|---|---|
| Astronomical Twilight Begin | 03:28 |
| Nautical Twilight Begin | 04:10 |
| Civil Twilight Begin | 04:49 |
| Sunrise | 05:20 |
| Sunset | 19:21 |
| Civil Twilight End | 19:52 |
| Nautical Twilight End | 20:31 |
| Astronomical Twilight End | 21:13 |
| Moon Illumination | 44.6% |