| Geyser | 1989-07-17 |
|---|---|
| Fan and Mortar | 0200 A |
| Veteran | 1206 |
| Vixen | 0940 |
| Values for Old Faithful Area | 1989-07-17 |
|---|---|
| Astronomical Twilight Begin | 03:39 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:19 |
| Sunrise | 05:54 |
| Sunset | 21:03 |
| Civil Twilight End | 21:39 |
| Nautical Twilight End | 22:24 |
| Astronomical Twilight End | 23:19 |
| Moon Illumination | 97.32% |