Dust in Comet 103P/Hartley 2 coma during EPOXI mission

The optical behavior of 103P/Hartley 2 is finally compared to those of other Jupiter-family comets such as Comet 9P/Tempel 1 impacted by the Deep Impact projectile in 2005 and Comet 67P/Churyumov-Gerasimenko, target of the Rosetta mission (2014-2015), since the polarimetric properties of both comets have been monitored remotely in the recent past.