What is the distance of a star whose parallax is 0.2 seconds of arc?

and what is the parallax of a star whose distance is 100 pc?What is the distance of a star whose parallax is 0.2 seconds of arc?Distance in parsecs is equal to the reciprocal of the parallax. So, 1/0.2 = 5 parsecs.



1 parsec is about 3.24 ly, so the star is 5 parsecs or about 16.2 lys in distance.



HTH



CharlesWhat is the distance of a star whose parallax is 0.2 seconds of arc?distance = 1 / parallax

distance = 1 / 0.2 = 5 parsecs or 16.3 light years

(guess the math is too complicated for you, huh?)



parallax = 1 / distance

parallax = 1/ 100 = .01 parsecs or .0326 light years