Venus Earth Ratio (Venus/Earth) Mass (1024 kg) 4.8685 5.9736 0.815 Volume (1010 km3) 92.843 108.321 0.857 Equatorial radius (km) 6051.8 6378.1 0.949 Polar radius (km) 6051.8 6356.8 0.952 Volumetric mean radius (km) 6051.8 6371.0 0.950 Ellipticity (Flattening) 0.000 0.00335 0.0 Mean density (kg/m3) 5243 5515 0.951 Surface gravity (eq.) (m/s2) 8.87 9.80 0.905 Surface acceleration (eq.) (m/s2) 8.87 9.78 0.907 Escape velocity (km/s) 10.36 11.19 0.926 GM (x 106 km3/s2) 0.3249 0.3986 0.815 Bond albedo 0.750 0.306 2.45 Visual geometric albedo 0.65 0.367 1.77 Visual magnitude V(1,0) -4.40 -3.86 - Solar irradiance (W/m2) 2613.9 1367.6 1.911 Black-body temperature (K) 231.7 254.3 0.911 Topographic range (km) 15 20 0.750 Moment of inertia (I/MR2) 0.33 0.3308 0.998 J2 (x 10-6) 4.458 1082.63 0.004 Number of natural satellites 0 1 Planetary ring system No No
Venus Earth Ratio (Venus/Earth) Semimajor axis (106 km) 108.21 149.60 0.723 Sidereal orbit period (days) 224.701 365.256 0.615 Tropical orbit period (days) 224.695 365.242 0.615 Perihelion (106 km) 107.48 147.09 0.731 Aphelion (106 km) 108.94 152.10 0.716 Synodic period (days) 583.92 - - Mean orbital velocity (km/s) 35.02 29.78 1.176 Max. orbital velocity (km/s) 35.26 30.29 1.164 Min. orbital velocity (km/s) 34.79 29.29 1.188 Orbit inclination (deg) 3.39 0.00 - Orbit eccentricity 0.0067 0.0167 0.401 Sidereal rotation period (hrs) -5832.5 23.9345 243.686 Length of day (hrs) 2802.0 24.0000 116.750 Obliquity to orbit (deg) 177.36 23.45 (0.113)
Discoverer: Unknown Discovery Date: Prehistoric Distance from Earth Minimum (106 km) 38.2 Maximum (106 km) 261.0 Apparent diameter from Earth Maximum (seconds of arc) 66.0 Minimum (seconds of arc) 9.7 Maximum visual magnitude -4.6 Mean values at inferior conjunction with Earth Distance from Earth (106 km) 41.44 Apparent diameter (seconds of arc) 60.2
Semimajor axis (AU) 0.72333199 Orbital eccentricity 0.00677323 Orbital inclination (deg) 3.39471 Longitude of ascending node (deg) 76.68069 Longitude of perihelion (deg) 131.53298 Mean Longitude (deg) 181.97973
Right Ascension: 272.76 Declination : 67.16 Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)
Surface pressure: 92 bars Surface density: ~65. kg/m3 Scale height: 15.9 km Total mass of atmosphere: ~4.8 x 1020 kg Average temperature: 737 K (464 C) Diurnal temperature range: ~0 Wind speeds: 0.3 to 1.0 m/s (surface) Mean molecular weight: 43.45 g/mole Atmospheric composition (near surface, by volume): Major: 96.5% Carbon Dioxide (CO2), 3.5% Nitrogen (N2) Minor (ppm): Sulfur Dioxide (SO2) - 150; Argon (Ar) - 70; Water (H2O) - 20; Carbon Monoxide (CO) - 17; Helium (He) - 12; Neon (Ne) - 7
Notes on the factsheets - definitions of parameters, units, notes on sub- and superscripts, etc.
Planetary Fact Table
- metric units
Planetary Fact Table
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Planetary Fact Table
- Earth ratio