| Geyser | 1975-11-20 |
|---|---|
| Anemone-Big | 1200-2359 |
| Beehive | 1204 |
| Dome | 1200-2359 |
| Giantess | 1802 ie |
| Values for Old Faithful Area | 1975-11-20 |
|---|---|
| Astronomical Twilight Begin | 05:43 |
| Nautical Twilight Begin | 06:18 |
| Civil Twilight Begin | 06:54 |
| Sunrise | 07:25 |
| Sunset | 16:52 |
| Civil Twilight End | 17:23 |
| Nautical Twilight End | 17:59 |
| Astronomical Twilight End | 18:33 |
| Moon Illumination | 98.13% |