| Geyser | 1980-09-13 |
|---|---|
| Bear Den | 1320 |
| Echinus | 1220 |
| Values for Old Faithful Area | 1980-09-13 |
|---|---|
| Astronomical Twilight Begin | 05:20 |
| Nautical Twilight Begin | 05:56 |
| Civil Twilight Begin | 06:31 |
| Sunrise | 07:00 |
| Sunset | 19:37 |
| Civil Twilight End | 20:06 |
| Nautical Twilight End | 20:41 |
| Astronomical Twilight End | 21:17 |
| Moon Illumination | 12.85% |