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Astronomy

Planets - Earth

  Bulk Parameters | Orbital Parameters
Mean Orbital Elements (J2000) | Magnetospheric Parameters
Atmospheric Parameters | Satellites
   
 
Bulk Parameters

Black-Body Temperature

254.3 K

Bond Albedo

0.306

Core Radius

3485 km

Ellipticity

0.00335

Equatorial Radius

6378.1 km

Escape Velocity

11.186 km s−1

GM

0.3986 × 106 km3 s−2

J2

1082.63 × 10−6

Mass

5.9736 × 1024 kg

Mean Density

5515 kg m−3

Moment of Inertia

0.3308 I MR−2

Polar Radius

6356.8 km

Solar Irradiance

1367.6 W m−2

Surface Gravity

9.78 m s−2

Topographic Range

20 km

Visual Geometric Albedo

0.367

Visual Magnitude (V(1,0))

−3.86

Volume

108.321 × 1010 km3

Volumetric Mean Radius

6371.0 km

 
 
Orbital Parameters

Aphelion

152.10 × 106 km

Length of Day

24.0000 hours

Maximum Orbital Velocity

30.29 km s−1

Mean Orbital Velocity

29.78 km s−1

Minimum Orbital Velocity

29.29 km s−1

Obliquity to Orbit

23.45

Orbital Eccentricity

0.0167

Orbital Inclination

0.000°

Perihelion

147.09 × 106 km

Semimajor Axis

149.60 × 106 km

Sidereal Orbit Period

365.256 days

Sidereal Rotation Period

23.9345 hours

Tropical Orbit Period

365.242 days

 
 
Mean Orbital Elements (J2000)

Longitude of Ascending Node

−11.26064°

Longitude of Perihelion

102.94719°

Mean Longitude

100.46435°

Orbital Eccentricity

0.01671022

Orbital Inclination

0.00005°

Semimajor Axis

1.00000011 AU

 
 
Magnetospheric Parameters

Dipole Field Strength

0.3076 gauss-R e 3 [*]

Dipole Offset (planet centre to dipole centre) distance

0.0725 R e [*]

Latitude of Dipole North

78.6° N

Latitude of Offset Vector

18.3° N

Longitude of Dipole North

70.1° W

Longitude of Offset Vector

147.8° E

[*] R e = Earth Radii (6378.1 km)
 
 
Atmospheric Parameters

Average Temperature

288 K

Diurnal Temperature Range

283 K to 293 K

Mean Molecular Weight

28.97 g mol−1

Scale Height

8.5 km

Surface Density

1.217 kg m−3

Surface Pressure

1014 mbar

Surface Wind Speeds

0 to 100 m s−1

Nitrogen N2 percentage in the atmosphere 78.084%
Oxygen O2 percentage in the atmosphere 20.946%
Water H2O percentage in the atmosphere 1%
Argon Ar percentage in the atmosphere 0.934%
Carbon
Dioxide CO2
percentage in the atmosphere 0.035%
Neon Ne percentage in the atmosphere 18.18 ppm
Helium He percentage in the atmosphere 5.24 ppm
CH4 percentage in the atmosphere 1.7 ppm
Krypton Kr percentage in the atmosphere 1.14 ppm
Hydrogen H2 percentage in the atmosphere 0.55 ppm
 
 
Satellites

Moon

 


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