| Geyser | 1987-05-29 |
|---|---|
| Porkchop | 1200 |
| Vixen | 1200 |
| Values for Old Faithful Area | 1987-05-29 |
|---|---|
| Astronomical Twilight Begin | 03:25 |
| Nautical Twilight Begin | 04:22 |
| Civil Twilight Begin | 05:08 |
| Sunrise | 05:43 |
| Sunset | 20:57 |
| Civil Twilight End | 21:33 |
| Nautical Twilight End | 22:19 |
| Astronomical Twilight End | 23:15 |
| Moon Illumination | 2.52% |