HST ( V, I ) photometry has been obtained for the inner halo globular cluster NGC 6652 .
The photometry reaches \sim 4 mag below the turn-off and includes a well populated horizontal branch ( HB ) .
This cluster is located close to the Galactic center at \hbox { R$ { } _ { GC } $ } \simeq 2.0 kpc with a reddening of \hbox { $ { E ( \hbox { $V - I$ } ) } $ } = 0.15 \pm 0.02 and has a metallicity of \hbox { $ [ { Fe } / { H } ] $ } \simeq - 0.85 .
Based upon \Delta V ^ { SGB } _ { HB } , NGC 6652 is 11.7 \pm 1.6 Gyr old .
Using \Delta V ^ { SGB } _ { HB } precise differential ages for 47 Tuc ( a thick disk globular ) , M107 and NGC 1851 ( both halo clusters ) were obtained .
NGC 6652 appears to be the same age as 47 Tuc and NGC 1851 ( within \pm 1.2 Gyr ) , while there is a slight suggestion that M107 is older than NGC 6652 by 2.3 \pm 1.5 Gyr .
As this is a less than 2 \sigma result , this issue needs to be investigated further before a definitive statement regarding the relative age of M107 and NGC 6652 may be made .