Definition of "milliarcsecond" []

• A unit of angle equal to one thousandth of an arcsecond (used especially in astronomy) (noun)

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• "We propose to use FGS 1R to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe/H]"
• "We propose to use FGS 1r to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe/H]"
• "We propose to use FGS 1r to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe / H] < - 1.5."