A star has an absolute magnitude M = 1.69 and an apparent magnitude m = 1.04. How far away is this star?
A) 24.2 ly
B) 43.2 ly
C) 59.7 ly
D) 160.2 ly

Question

Quizplus · Accepted Answer

The distance to the star can be calculated using the distance modulus formula: $m - M = 5 \log_{10}(d) - 5$, where $m$ is the apparent magnitude, $M$ is the absolute magnitude, and $d$ is the distance in parsecs. Solving for $d$ gives a distance of approximately 24.2 light years.

A Star Has an Absolute Magnitude M = 1