SCYON Abstract

Received on June 6 2002

The intermediate-age open cluster NGC 2112

AuthorsGiovanni Carraro, Robero Barbon, Carla S. Boschetti
AffiliationPadova University
Accepted byMonthly Notices of the Royal Astronomical Society
Links NGC 2112


We report on BVI CCD photometry of a field centered on the region of the intermediate-age open cluster NGC 2112 down to V=21. Due to the smaller field coverage, we are able to limit the effect of field star contamination which hampered in the past precise determinations of the cluster age and distance. This way, we provide updated estimates of NGC 2112 fundamental parameters. Having extended the photometry to the I pass-band, we are able to construct a colour-colour diagram, from which we infer a reddening E(B-V) = 0.63 ± 0.14 mag. The comparison of the Colour-Magnitude Diagram (CMD) with theoretical isochrones leads to a distance of 850 ± 100 pc, and an age of 2.0 ± 0.3 Gyr. While the distance is in agreement with previous determinations, the age turns out to be much better constrained and significantly lower than previous estimates.