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19 May, 09:10

For a star with a parallax angle of 1/2 of an at arcsecond, what will be its distance in parsec?

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  1. 19 May, 10:09
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    (1 parsec) is the distance at which an object has a parallax of 1 arcsecond. The distance is about 3.26 light years.

    Another way to understand it is: The distance from which the Earth's orbit appears 1 arcsecond across.

    For a parallax angle of 1/2 arcsecond, the distance is 2 parsecs (about 6.52 light years).

    1 arcsecond is 1/3600 of a degree, 0.00028 degree.
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