Semi Major Axis Of Earth

Globe Fact Sheet

Majority parameters

Mass (10²⁴        kg)                 5.9722 Book (ten^x        km³)             108.321    Equatorial radius (km)	        6378.137     Polar radius (km)               6356.752          Volumetric hateful radius (km)     6371.000 Core radius (km)                3485 Ellipticity (Flattening)        0.003353       Mean density (kg/m³)            5513       Surface gravity (1000/sⁱⁱ)          nine.798   Surface acceleration (m/sⁱⁱ)     9.780         Escape velocity (km/south)         xi.186 GM (x 10⁶        km^three/s^two)               0.39860       Bond albedo                     0.306   Geometric albedo                0.434 V-band magnitude 5(1,0)        -3.99 Solar irradiance (W/thou²)         1361.0     Blackness-torso temperature (One thousand)       254.0     Topographic range (km)            twenty.four Moment of inertia (I/MR²)       0.3308 J₂        (x 10^-6)                    1082.63       Number of natural satellites       one           Planetary ring organisation             No

Orbital parameters

Semimajor centrality (x^{half dozen}        km)         149.598     Sidereal orbit period (days)    365.256 Tropical orbit period (days)    365.242     Perihelion (ten^half-dozen        km)             147.095         Aphelion (10⁶        km)               152.100 Mean orbital velocity (km/s)     29.78         Max. orbital velocity (km/s)     30.29 Min. orbital velocity (km/s)     29.29 Orbit inclination (deg)           0.000      Orbit eccentricity                0.0167      Sidereal rotation period (hrs)   23.9345     Length of day (hrs)              24.0000 Obliquity to orbit (deg)         23.44 Inclination of equator (deg)     23.44

Earth Mean Orbital Elements (J2000)

Semimajor centrality (AU)                  1.00000011   Orbital eccentricity                 0.01671022    Orbital inclination (deg)            0.00005   Longitude of ascending node (deg)  -11.26064   Longitude of perihelion (deg)      102.94719   Mean Longitude (deg)               100.46435

North Pole of Rotation

Right Ascension:  0.00 - 0.641T Declination    : 90.00 - 0.557T Reference Date : 12:00 UT one Jan 2000 (JD 2451545.0) T = Julian centuries from reference date

Terrestrial Magnetosphere

Model GSFC-1283  Dipole field strength: 0.306 Gauss-Reⁱⁱⁱ        Dipole offset: 0.076 Re Surface (1 Re) field forcefulness: 0.24 - 0.66 Gauss  Geomagnetic Poles - Model WMM2020  Geocentric Dipole: 80.65 Northward, 72.68 W Magnetic North Pole: 86.50 N, 164.04 Eastward

Re denotes World model radius, here defined to be 6,378 km

Terrestrial Temper

Surface force per unit area: 1014 mb Surface density: 1.217 kg/mⁱⁱⁱ        Calibration height: eight.5 km Total mass of temper:  5.1 x ten¹⁸        kg Full mass of hydrosphere:  one.four ten 10²¹        kg Boilerplate temperature:  288 K (15 C) Diurnal temperature range: 283 K to 293 Chiliad (10 to xx C) Current of air speeds: 0 to 100 1000/south Hateful molecular weight: 28.97  Atmospheric limerick (past book, dry out air):      Major      : 78.08% Nitrogen (Northward₂), 20.95% Oxygen (O₂),      Modest (ppm): Argon (Ar) - 9340; Carbon Dioxide (CO₂) - 415                  Neon (Ne) - eighteen.18; Helium (He) - five.24; CH₄        - ane.7                  Krypton (Kr) - i.14; Hydrogen (H₂) - 0.55      Numbers practise not add up to exactly 100% due to roundoff and uncertainty     Water is highly variable, typically makes up about one%

The Moon

For information on the Moon, come across the Moon Fact Sheet

Notes on the factsheets - definitions of parameters, units, notes on sub- and superscripts, etc.

Planetary Fact Table - metric units
Planetary Fact Table - U.S. units
Planetary Fact Table - Earth ratio

Earth Page

Directory to other Planetary Fact Sheets

Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDCA, Mail Code 690.1
NASA Goddard Infinite Flight Eye
Greenbelt, Md 20771
+1-301-286-1258

NASA Official: Dave Williams, david.r.williams@nasa.gov
Last Updated: 21 December 2021, DRW