Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. Yes, a sketch of a very skinny triangle is useful with tiny angle a (1°/3600 1'), the opposite side r being 1 AU 150 million km, and the adjacent side and hypotenuse both essentially the same distance: let the hypotenuse d 1 parsec 1 parsec is the distance where the parallax of a star equals 1 second of arc. (pc) The distance at which 1 au would measure 1 sec of arc, equal to 19.16 trillion mi (30.857 trillion km) or 206,265 au or 3.26 ly (1). ![]() It is exactly 648,000/ astronomical units, or approximately 30.9 trillion kilometers. A parsec is also equivalent to approximately 3.26 light years (the journey distance if you travelled at the speed of light for three years and three months). A parsec is a unit of distance used in astronomy. It is approximately equal to 0.621 miles, 1094 yards or 3281 feet.Ĭonversion calculator for all types of measurement units. The parsec is a unit of length equivalent to around 20 trillion (20,000,000,000,000) miles, 31 trillion kilometres, or 206,264 times the distance from the earth to the sun. It stands for "parallax of one arc second", and is approximately 19,131,554,073,600 (19 trillion) miles.Ī kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). You have calculated the distance to Proxima Centauri in both kms and parsecs in Q9. The parsec (symbol pc) is a unit of length used in astronomy. Then use the size of 1 AU in km to calculate: that 1 parsec km which AU. Its used to measure huge distances to objects and. ![]() The definition of a parsec is as follows: Therefore, 1 parsec, 206264.806247096 astronomical units Therefore, 1 parsec 3.085677581×1016 metres Therefore, 1 parsec 30.856775815 trillion. It is equal to 3.26156 ly (light years) which is approximately 31 trillion kilometres (19 trillion miles). A unit of length used in describing astronomical distances, equal to 3.26 light years, or 3.086 x 1013 km. The SI prefix "mega" represents a factor of Kilometers to megaparsec, or enter any two units below: Enter two units to convert From: You can do the reverse unit conversion from A parsec is a unit of distance that is often used by astronomers as an alternative to the light-year, just as kilometers can be used as an alternative to miles.
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