| Geyser | 1973-04-06 |
|---|---|
| Ledge | 2050 A |
| Valentine | 1012 |
| Values for Old Faithful Area | 1973-04-06 |
|---|---|
| Astronomical Twilight Begin | 04:12 |
| Nautical Twilight Begin | 04:49 |
| Civil Twilight Begin | 05:25 |
| Sunrise | 05:54 |
| Sunset | 18:56 |
| Civil Twilight End | 19:26 |
| Nautical Twilight End | 20:01 |
| Astronomical Twilight End | 20:39 |
| Moon Illumination | 10.59% |