USS
SPECIALIST
9 9 9 ALASKA
9 9 9 CANADA
9 9 9 NORTH AMERICA
9 9 9 MEXICO
9 9 9 CENTRAL AMERICA
9 9 9 SOUTH AMERICA
9 9 9 ANTARCTICA - Atlantis
9 9 9 AFRCA
9 9 9 ASIA
9 9 9 EUROPE
9 9 9 INDIA
9 9 9 PAKISTAN
9 9 9 TIBET
9 9 9 CHINA
9 9 9 POLYNESIA
9 9 9 NEW ZEALAND
9 9 9 MIDDLE EAST
9 9 9 WEST BANK
9 9 9 IRAQ
9 9 9 IRAN
9 9 9 SAUDI ARABIA
9 9 9 DUBAI
LOCATION
9 9 9 ALASKA
9 9 9 CANADA
9 9 9 NORTH AMERICA
9 9 9 MEXICO
9 9 9 CENTRAL AMERICA
9 9 9 SOUTH AMERICA
9 9 9 ANTARCTICA - Atlantis
9 9 9 AFRCA
9 9 9 ASIA
9 9 9 EUROPE
9 9 9 INDIA
9 9 9 PAKISTAN
9 9 9 TIBET
9 9 9 CHINA
9 9 9 POLYNESIA
9 9 9 NEW ZEALAND
9 9 9 MIDDLE EAST
9 9 9 WEST BANK
9 9 9 IRAQ
9 9 9 IRAN
9 9 9 SAUDI ARABIA
9 9 9 DUBAI
DESCRIPTION
9 9 9 ALASKA
9 9 9 CANADA
9 9 9 NORTH AMERICA
9 9 9 MEXICO
9 9 9 CENTRAL AMERICA
9 9 9 SOUTH AMERICA
9 9 9 ANTARCTICA - Atlantis
9 9 9 AFRCA
9 9 9 ASIA
9 9 9 EUROPE
9 9 9 INDIA
9 9 9 PAKISTAN
9 9 9 TIBET
9 9 9 CHINA
9 9 9 POLYNESIA
9 9 9 NEW ZEALAND
9 9 9 MIDDLE EAST
9 9 9 WEST BANK
9 9 9 IRAQ
9 9 9 IRAN
9 9 9 SAUDI ARABIA
9 9 9 DUBAI
MISSION TITLE
9 9 9 ALASKA
9 9 9 CANADA
9 9 9 NORTH AMERICA
9 9 9 MEXICO
9 9 9 CENTRAL AMERICA
9 9 9 SOUTH AMERICA
9 9 9 ANTARCTICA - Atlantis
9 9 9 AFRCA
9 9 9 ASIA
9 9 9 EUROPE
9 9 9 INDIA
9 9 9 PAKISTAN
9 9 9 TIBET
9 9 9 CHINA
9 9 9 POLYNESIA
9 9 9 NEW ZEALAND
9 9 9 MIDDLE EAST
9 9 9 WEST BANK
9 9 9 IRAQ
9 9 9 IRAN
9 9 9 SAUDI ARABIA
9 9 9 DUBAI
SECTION
9 9 9 ALASKA
9 9 9 CANADA
9 9 9 NORTH AMERICA
9 9 9 MEXICO
9 9 9 CENTRAL AMERICA
9 9 9 SOUTH AMERICA
9 9 9 ANTARCTICA - Atlantis
9 9 9 AFRCA
9 9 9 ASIA
9 9 9 EUROPE
9 9 9 INDIA
9 9 9 PAKISTAN
9 9 9 TIBET
9 9 9 CHINA
9 9 9 POLYNESIA
9 9 9 NEW ZEALAND
9 9 9 MIDDLE EAST
9 9 9 WEST BANK
9 9 9 IRAQ
9 9 9 IRAN
9 9 9 SAUDI ARABIA
9 9 9 DUBAI
SEARCH
sPHErE
Bulk parameters
Mass (1024 kg) 5.9736
Volume (1010 km3) 108.321
Equatorial radius (km) 6378.1
Polar radius (km) 6356.8
Volumetric mean radius (km) 6371.0
Core radius (km) 3485
Ellipticity (Flattening) 0.00335
Mean density (kg/m3) 5515
Surface gravity (m/s2) 9.798
Surface acceleration (m/s2) 9.780
Escape velocity (km/s) 11.186
GM (x 106 km3/s2) 0.3986
Bond albedo 0.306
Visual geometric albedo 0.367
Visual magnitude V(1,0) -3.86
Solar irradiance (W/m2) 1367.6
Black-body temperature (K) 254.3
Topographic range (km) 20
Moment of inertia (I/MR2) 0.3308
J2 (x 10-6) 1082.63
Number of natural satellites 1
Planetary ring system No
Orbital parameters
Semimajor axis (106 km) 149.60
Sidereal orbit period (days) 365.256
Tropical orbit period (days) 365.242
Perihelion (106 km) 147.09
Aphelion (106 km) 152.10
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) 23.45
Earth Mean Orbital Elements (J2000)
Semimajor axis (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 1 Jan 2000 (JD 2451545.0)
T = Julian centuries from reference date
Terrestrial Magnetosphere
Dipole field strength: 0.3076 gauss-Re3
Latitude/Longitude of dipole N: 78.6 degrees N/70.1 degrees W
Dipole offset (planet center to dipole center) distance: 0.0725 Re
Latitude/Longitude of offset vector: 18.3 degrees N/147.8 degrees E
Note: Re denotes Earth radii, 6,378 km
Terrestrial Atmosphere
Surface pressure: 1014 mb
Surface density: 1.217 kg/m3
Scale height: 8.5 km
Total mass of atmosphere: 5.1 x 1018 kg
Total mass of hydrosphere: 1.4 x 1021 kg
Average temperature: 288 K (15 C)
Diurnal temperature range: 283 K to 293 K (10 to 20 C)
Wind speeds: 0 to 100 m/s
Mean molecular weight: 28.97 g/mole
Atmospheric composition (by volume, dry air):
Major : 78.08% Nitrogen (N2), 20.95% Oxygen (O2),
Minor (ppm): Argon (Ar) - 9340; Carbon Dioxide (CO2) - 380
Neon (Ne) - 18.18; Helium (He) - 5.24; CH4 - 1.7
Krypton (Kr) - 1.14; Hydrogen (H2) - 0.55
Numbers do not add up to exactly 100% due to roundoff and uncertainty
Water is highly variable, typically makes up about 1%
PROJECT EARTH