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Equatorial radii: Object Equatorial radius (km) Mercury: 2 439 ±1 Venus: 6 052 ±6 Earth: 6 378.140 ±0.005 Mars: 3 397.2 ±1 Jupiter: 71 398 Saturn: 60 000 Uranus: 25 400 Neptune: 24 300 Pluto: 2 500 Moon: 1 738 Moon's disk, ratio to Earth's equatorial radius: k = 0.272 5076 a e [19] Sun: 696 000
According to data from the Pioneer Venus Orbiter altimeters, nearly 51% of the surface is located within 500 meters (1,600 feet) of the median radius of 6,052 km (3,761 mi); only 2% of the surface is located at elevations greater than 2 kilometres (1.2 mi) from the median radius.
Venus has several times as many volcanoes as Earth, and it has 167 large volcanoes that are over 100 km (60 mi) across. The only volcanic complex of this size on Earth is the Big Island of Hawaii. [ 46 ] : 154 More than 85,000 volcanoes on Venus have been identified and mapped.
Venus was 0.7205 au from the Sun on the day of transit, decidedly less than average. [9] Moving far backwards in time, more than 200,000 years ago Venus sometimes passed by at a distance from Earth of barely less than 38 million km, and will next do that after more than 400,000 years.
a (equatorial radius): 6 378 137.0 m (inverse flattening): 298.257 223 563. from which one derives b (polar radius): 6 356 752.3142 m, so that the difference of the major and minor semi-axes is 21.385 km (13 mi).
or = ′ ^ + ′ ^ + ′ ^ where, is the respective observer position vector (in Equatorial Coordinate System) is the equatorial radius of the central body (e.g., 6,378 km for Earth)
Venus currently has a surface temperature of 450℃ (the temperature of an oven’s self-cleaning cycle) and an atmosphere dominated by carbon dioxide (96%) with a density 90 times that of Earth’s.
Its orbital eccentricity of 1.20 indicates that ʻOumuamua has never been gravitationally bound to the Sun. It was discovered 0.2 AU (30 000 000 km; 19 000 000 mi) from Earth and is roughly 200 meters in diameter. It has an interstellar speed (velocity at infinity) of 26.33 km/s (58 900 mph).