| Geyser | 1980-10-21 |
|---|---|
| Giantess | 1655 |
| Values for Old Faithful Area | 1980-10-21 |
|---|---|
| Astronomical Twilight Begin | 06:09 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:17 |
| Sunrise | 07:46 |
| Sunset | 18:28 |
| Civil Twilight End | 18:58 |
| Nautical Twilight End | 19:32 |
| Astronomical Twilight End | 20:06 |
| Moon Illumination | 89.94% |