Question

Find the apparent magnitude of the star Vega if its absolute magnitude is +0.3 and its parallax angle p = 0."123.

Answer 1

Answer on question #54917, Physics / Astronomy — Astrophysics

Question Find the apparent magnitude of the star Vega if its absolute magnitude is $+0.3$ and its parallax angle p = 0."123.

Solution Distance in parsecs is

$d=\frac{1}{0.123}\approx 8.13\,pc$

The absolute magnitude then is

$M=m-5((\log_{10}d)-1)\approx 0.75$

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