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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 Speed

0 to 100 m s−1

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

Moon

 


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