Color–magnitude diagram based upon the UCAC3 R _u and 2MASS J magnitudes. Plus signs mark probable, main-sequence members, while × symbols are used for the remainder of the sample that meets the positional and proper motion criteria for cluster membership. The solid line shows the best-fit isochrone. The dashed line indicates the pre-main-sequence isochrone for an age of 7 Myr. The dotted line is the isochrone for distant OB stars that may be related to the nearby cluster Berkeley 87.