It takes Mercury 88 earth days to orbit the sun. As it travels, it spins slowly. In fact each day on mercury is equal to 58.7 Earth days. This means that there are fewer than two days in one mercury years. So uring its long night, when half of the planets face away from the sun, the temprature can plummet as low as 173*C.
| Equatorial radius (km) | 2,439.7 |
| Mean distance from the sun (km) | 57,909,175 |
| Rotational period (days) | 58.6462 |
| Orbital period (days) | 87.969 |
| Max. surface tempraature | 427*C |
| Min. surface temprature | 173*C |
