Question

Finally, back to those four stars:

Aldermin: m_V = 2.45, M_V = 1.56, (B-V) = 0.26, found in the constellation Cepheus

Segin: m_V = 3.35, M­_V = -2.16, (B-V) = – 0.15, found in the constellation Cassiopeia

Alcor: m_V = 3.95, M_V = 1.96, (B-V) = 0.16, found in the constellation Ursa Major

Gienah: m_V = 2.55, M_V = -0.82, (B-V) = – 0.09, found in the constellation Corvus

Which star has a distance of approximately 47 parsecs?

		Aldermin
		Segin
		Alcor
		Gienah
		That information is not available

Answer 1

Only m_V and M_V are needed to calculate the distance of the stars.

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