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Fig. 5.
Colour–magnitude diagrams for likely members of NGC 6664. Colours and symbols are the same as those in Fig. 4. The black line shows the best-fitting PARSEC isochrone (log τ = 7.90). Star BD-08 4641, a good candidate to be a new YSG cluster member, is highlighted as a brown square that is very close to the Cepheid EV Sct.
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