| Geyser | 1973-09-28 |
|---|---|
| Africa | 1500 |
| Cistern Spring | 1000 |
| Congress Pool | 1500 |
| Dabble | 1045 ? |
| Echinus | 1027 |
| Green Dragon Spring | 1000 |
| Little Whirligig | 1500 |
| Orby | 1045 A |
| Values for Old Faithful Area | 1973-09-28 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:15 |
| Civil Twilight Begin | 06:48 |
| Sunrise | 07:17 |
| Sunset | 19:10 |
| Civil Twilight End | 19:38 |
| Nautical Twilight End | 20:12 |
| Astronomical Twilight End | 20:47 |
| Moon Illumination | 3.19% |