I. Scale factor 1. Measure to the nearest millimeter the distance from the "a" line to the "g" line: mm 2. 5015.7 A - 3888.7 A = A 3. #2 / #1 = A/mm (this is your scale factor for part II below ONLY) II. Velocity Determinations Fill-in the data table below (5 x 9 = 45 pts) Distance on spectrum 2 = 2, + (#3) (s) R = X - A rest V = (Rxc)/ Arest Average Galaxy in mm (s) (A) (A) in km/s V in km/s in K H K H K H K H K & H Virgo Ursa Major Corona Borealis Bootes Hydra III. Distance Determinations