| Geyser | 1973-04-03 |
|---|---|
| Ledge | 1941 |
| Valentine | 1335 min |
| Values for Old Faithful Area | 1973-04-03 |
|---|---|
| Astronomical Twilight Begin | 04:18 |
| Nautical Twilight Begin | 04:55 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:00 |
| Sunset | 18:52 |
| Civil Twilight End | 19:22 |
| Nautical Twilight End | 19:57 |
| Astronomical Twilight End | 20:34 |
| Moon Illumination | 0.06% |