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High-dispersion spectra of 89 potential members of the old, super-metal-richopen cluster, NGC 6253, have been obtained with the HYDRA multi-objectspectrograph. Based upon radial-velocity measurements alone, 47 stars at theturnoff of the cluster color-magnitude diagram (CMD) and 18 giants areidentified as potential members. Five turnoff stars exhibit evidence ofbinarity while proper-motion data eliminates two of the dwarfs as members. Themean cluster radial velocity from probable single-star members is -29.4 +/- 1.3km/sec (sd). A discussion of the current estimates for the cluster reddening,derived independently of potential issues with the BV cluster photometry, leadto an adopted reddening of E(B-V) = 0.22 +/- 0.04. From equivalent widthanalyses of 38 probable single-star members near the CMD turnoff, the weightedaverage abundances are found to be [Fe/H] = +0.43 +/- 0.01, [Ni/H] = +0.53 +/-0.02 and [Si/H] = +0.43 (+0.03,-0.04), where the errors refer to the standarderrors of the weighted mean. Weak evidence is found for a possible decline inmetallicity with increasing luminosity among stars at the turnoff. We discussthe possibility that our turnoff stars have been affected by microscopicdiffusion. For 15 probable single-star members among the giants, spectrumsynthesis leads to abundances of +0.46 (+0.02,-0.03) for [Fe/H]. While lessthan half the age of NGC 6791, NGC 6253 is at least as metal-rich and, withinthe uncertainties, exhibits the same general abundance pattern as that typifiedby super-metal-rich dwarfs of the galactic bulge.

WIYN Open Cluster Study. XXXIX. Abundances in NGC 6253 from HYDRA Spectroscopy of the Li 6708 A Region