| Geyser | 1981-02-03 |
|---|---|
| Steamvalve Spring | 0000 |
| Values for Old Faithful Area | 1981-02-03 |
|---|---|
| Astronomical Twilight Begin | 05:59 |
| Nautical Twilight Begin | 06:33 |
| Civil Twilight Begin | 07:08 |
| Sunrise | 07:39 |
| Sunset | 17:35 |
| Civil Twilight End | 18:06 |
| Nautical Twilight End | 18:40 |
| Astronomical Twilight End | 19:14 |
| Moon Illumination | 3.2% |