1994A&AS..108..653O

NGC 6440 is another case of bulge high metallicity globular cluster with particular colour magnitude diagram properties, like those of NGC 6553, NGC 6528 and Terzan 1. We present V and I observations of NGC 6440, and find a reddening of E(B-V)≃1.00±0.1, and a distance of d_☉≃8.47kpc. The colour magnitude diagram morphology shows characteristics very similar to those of NGC 6553 and NGC 6528, in particular the horizontal branch clump almost superimposed on the giant branch, and a curved upper giant branch, showing that NGC 6440 also has a metallicity close to solar. The observations are available in electronic form at the CDS (ftp 130.79.128.5).