Below is a finder chart for the Pleiades star cluster (also known as the Seven S

Question

Below is a finder chart for the Pleiades star cluster (also known as the Seven Sisters). On a very dark night those with average vision should see the 7 brightest stars of the 10 labeled below (Asterope is a double star, and counts as two). However, those without corrective lenses would not be able to resolve individual stars, and might just see a "fuzz" of light; the integrated brightness of all stars. What is the combined magnitude of this "fuzz" (i.e. the integrated magnitude of the 10 stars below)?

Explanation / Answer

The magnitude will be equal to magnitude of all 10 stars

sum of magnitude is

S=3.7+5.4+3.9+4.3+5.8+6.4+5.1+3.6+2.8+4.1=45.1

so He will se magnitude of m45.1

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