| Geyser | 1975-12-17 |
|---|---|
| Beehive | 1448 |
| Lone Star | 1310 |
| Old Faithful | 1129 short, 1216 short, 1336 short, 1420 long, 1535 short |
| Values for Old Faithful Area | 1975-12-17 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:20 |
| Sunrise | 07:53 |
| Sunset | 16:44 |
| Civil Twilight End | 17:18 |
| Nautical Twilight End | 17:54 |
| Astronomical Twilight End | 18:30 |
| Moon Illumination | 98.1% |