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Parameters of planet Earth

• Equatorial radius: 6378.1 km
• Polar radius: 6356.8 km
• Average radius: 6371 km
• Equatorial diameter: ~12'742 km
• Surface area: 510.1 million km²
  • Land: ~29.2% (~149 million km²)
  • Water: ~70.8% (~361 million km²)
• Mass: ~5,972×10²⁴ kg
• Average distance from the Sun: ~149.6 million km (1 AU)
• Average orbital velocity: ~29.78 km/s
• Orbital period (duration of the year): 365.25 days
• Duration of a day: ~23 hours 56 minutes (sidereal day), ~24 hours (solar day)
• Tilt of the axis of rotation: 23.44°
• Rotation speed at the equator: ~1670 km/h
• Atmospheric composition
  • Nitrogen (N₂): 78.08%
  • Oxygen (O₂): 20.95%
  • Argon (Ar): 0.93%
  • Other gases (carbon dioxide, neon, etc.)
• Average atmospheric pressure: ~101.325 kPa (at sea level)
• Average free fall acceleration: ~9.81 m/s
• First space velocity: ~7.91 km/s
  

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