A corollary states that a parsec is also the distance from which a disc one astronomical unit in diameter must be viewed for it to have an
angular diameter of one arcsecond (by placing the observer at
D and a diameter of the disc on
ES).
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Parsec - Wikipedian be calculated:
Therefore, 1 parsec ≈ 7005206264806247096♠206264.806247096 astronomical units ≈ 7016308567758100000♠3.085677581×10 16 metres ≈ 7001191735115770000♠19.173511577 trillion miles ≈ 7000326156377700000♠3.261563777 light-years
<span>A corollary states that a parsec is also the distance from which a disc one astronomical unit in diameter must be viewed for it to have an angular diameter of one arcsecond (by placing the observer at D and a diameter of the disc on ES).
The length of the parsec used in IAU 2015 Resolution B2 [9] (exactly 7005648000000000000♠648000/π astronomical units) corresponds exactly to that derived using the small-angle calcul Summary
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