5. What is the semi-amplitude, K? To find this, take 1/2 of the full range of the velocities. For example, we measure a maximum redshift velocity to be 25 m/s and a minimum blueshift velocity to be -29 m/s, making the full range 54 m/s. Divide that by 2 and we get K = 27 m/s. m/s %3D K =
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