We update the currently known populations of asteroids in major mean motion resonances with Jupiter - namely in the J2/1, J3/2 and J4/3 - and present their orbital and physical characteristics. We focus on an impact -generated Schubart cluster among J3/2 asteroids and we also report an identification of two new asteroids in the J4/3 resonance.
We discuss their long-term evolution and possible origin.