NGC2362

In Mayne et al (2007) we find an age of 3Myrs. The cluster NGC2362 is included the disc fraction studies, as in the ONC, NGC2264 and IC348. In Mayne et al (2007) we use the photometric catalogue of members from Dahm (2005), these members are identified using a H&alpha wide field survey. In Mayne et al (2007) we find a relative age of 3Myr. This age suggests an age sequence of the ONC, NGC2264, NGC2362 and IC348. This new relative age sequence creates problems for the universal decline of disc fractions. NGC2362 has too few discs at a relatively low age, this maybe caused by a harsh local environment. For example IC348 does not contain any O stars whereas NGC2362 has around 13.