| Geyser | 1983-05-19 |
|---|---|
| Dog's Leg Spring | 1200 |
| Emerald Spring | 1200 |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1983-05-19 |
|---|---|
| Astronomical Twilight Begin | 03:42 |
| Nautical Twilight Begin | 04:33 |
| Civil Twilight Begin | 05:17 |
| Sunrise | 05:51 |
| Sunset | 20:47 |
| Civil Twilight End | 21:21 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:57 |
| Moon Illumination | 46.17% |