Orbital eccentricity
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| MERCURY
DATA |
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| Orbital parametres | ||||
| Distance from Sun (semimajor axis) | 57.9 million km | (0.39 AU) | ||
| Minimum distance (perihelion) | 46.0 million km | (0.31 AU) | ||
| Maximum distance (aphelion) | 69.8 million km | (0.46 AU) | ||
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Orbital eccentricity |
0.2058 | |||
| Length of year (orbital period) | 87.96 days | (0.24 years) | ||
| Length of day (rotational period) | 1,408 hours | (58.8 days) | ||
| Average orbital velocity | 47.89 km/s | |||
| Orbital inclination | 7.0 degrees | |||
| Axial tilt (obliquity) | 0.5 degrees | |||
| Physical Properties | ||||
| Equatorial radius | 2,437 km | (0.38 x Earth) | ||
| Mass | 0.330 x1024 kg | (0.06 x Earth) | ||
| Volume | 6.085 x1010 km3 | (0.06 x Earth) | ||
| Average density | 5,430 kg/cm3 | (0.98 x Earth) | ||
| Oblateness | 0.0 | |||
| Surface gravity at equator | 3.70 m/s2 | (0.38 x Earth) | ||
| Escape velocity | 4.25 km/s | (0.38 x Earth) | ||
| Solar irradiance | 3,566 Watts/m2 | (2.58 x Earth) | ||
| Surface temperature | 100 to 700 K | (-173 to 427o C) | ||
| Albedo | 0.11 | |||
| Maximum visual magnitude | -1.9 | More about planetary orbits | ||
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