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Earth

Earth
Orbital Characteristics of Earth

Orbital Characteristics

Perihelion: 147,098,074 km, 0.9832898912 AE
Aphelion: 152,097,701 km, 1.0167103335 AE
Semi-major axis: 149,597,887.5 km, 1.0000001124 AE
Eccentricity: 0.016710219
Orbital period: 365.256366 days
Synodic period:
Average orbital speed: 29.783 km/s
Mean anomaly:
Inclination: 1°34'43.3"
Longitude of ascending node: 348.73936°
Argument of perihelion: 114.20783°

Satellites/moons: 1 (Moon)

Physical Characteristics of Earth

Physical Characteristics

Equatorial radius: 6,378.1 km
Flattening: 0.0033528
Surface area: 510,072,000 km2
Volume: 1.0832073×1012 km3
Mass: 5.9736×1024 kg
Mean density: 5.5153 g/cm3
Equatorial surface gravity: 9.780327 m/s2
Escape velocity: 11.186 km/s
Sidereal rotation period: 0.99726968 d Earth days, 23h 56m 4.100s Earth hours
Axial tilt : 23.439281°
Albedo: 0.367
Average surface temperatures: 185/331 K, -88/58 °C, -126/136 °F
Apparent magnitude:
Angular diameter:
The Atmosphere of Earth

The Atmosphere

Composition:
  • 78.08% Nitrogen (N2)
  • 20.95% Oxygen (O2)
  • 0.93% Argon
  • 0.038% Carbon dioxide (CO2)
  • ca. 1% water vapor (H2O)
  • 18.18 ppm Neon
  • 5.24 ppm Helium
  • 1.745 ppm Methane (CH4)
  • 1.14 ppm Krypton
  • 0.55 ppm Hydrogen (H2)

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