Reference
Useful Distances
| Distance from Earth's center | km | miles | Earth radii | LD | AU |
|---|---|---|---|---|---|
| Mean Earth Radius | 6,371 | 3,959 | 1 | 0.02 | 0.000043 |
| ISS Mean Orbit Distance | 6,779 | 4,212 | 1.06 | 0.018 | 0.000045 |
| Geosynchronous Orbit Distance | 42,164 | 26,199 | 6.6 | 0.11 | 0.000282 |
| Mean Lunar Distance | 384,402 | 238,856 | 60 | 1 | 0.002570 |
| PHA threshold (distance from Earth's ORBIT) | 7,479,894 | 4,647,790 | 1,174 | 19.5 | 0.05 |
| AU | 149,597,871 | 92,955,807 | 23,481 | 389 | 1 |