| Geyser | 1988-08-28 |
|---|---|
| Giantess | 1418 |
| Values for Old Faithful Area | 1988-08-28 |
|---|---|
| Astronomical Twilight Begin | 04:56 |
| Nautical Twilight Begin | 05:35 |
| Civil Twilight Begin | 06:11 |
| Sunrise | 06:41 |
| Sunset | 20:06 |
| Civil Twilight End | 20:36 |
| Nautical Twilight End | 21:13 |
| Astronomical Twilight End | 21:52 |
| Moon Illumination | 99.03% |