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km2rad

Convert distance from kilometers to radians

Syntax

rad = km2rad(km)
rad = km2rad(km,radius)
rad = km2rad(km,sphere)

Description

rad = km2rad(km) converts distances from kilometers to radians as measured along a great circle on a sphere with a radius of 6371 km, the mean radius of the Earth.

rad = km2rad(km,radius) converts distances from kilometers to radians as measured along a great circle on a sphere having the specified radius. radius must be in units of kilometers.

rad = km2rad(km,sphere)converts distances from kilometers to radians , as measured along a great circle on a sphere approximating an object in the Solar System. sphere may be one of the following strings: 'sun', 'moon', 'mercury', 'venus', 'earth', 'mars', 'jupiter', 'saturn', 'uranus', 'neptune', or 'pluto', and is case-insensitive.

Examples

How many radians does 1,000 km span on the Earth and on the Moon?

rad = km2rad(1000)

rad =
    0.1570

rad = km2rad(1000,'moon')

rad =
    0.5754

See Also

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