| Geyser | 1983-01-08 |
|---|---|
| Blue Mud Steam Vent | 1200 |
| Branch Spring | 1200 |
| Values for Old Faithful Area | 1983-01-08 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 17:01 |
| Civil Twilight End | 17:33 |
| Nautical Twilight End | 18:10 |
| Astronomical Twilight End | 18:45 |
| Moon Illumination | 29.05% |