These just received from ESA Mission Director Kris Capelle at ATV-CC. Note the entire undocking, orbiting and reentry procedure is done in real-time with only a few pre-programmed commands, so all times are subject to change.

20 Jun
UTC – CEST
14:39 – 16:39 Demerge (break all data & electric connections between ATV & ISS)
14:43 – 16:43 ISS & ATV in free drift
14:44 – 16:44 Open ATV hooks (Nominal) – These hooks cconnect ATV to station; station hooks already unlatched at 12:20UT
14:45 – 16:45 Open ATV hooks (Latest)
14:48 – 16:48 SEPARATION – Nominal – spring push-back – a few cm/sec
14:50 – 16:50 SEPARATION – Latest
14:51 – 16:51 Separation boost (Latest)
15:05 – 17:05 ATV moves outside ISS ‘Approach Ellipsoid’ – ATV now safely away from Station

21 Jun
UTC – CEST
17:07 – 19:07 Deorbit Burn 1 (609 sec; -47m/s)
20:52 – 21:52 Deorbit Burn 2 (849 sec; -70 m/s)
20:59 – 22:59 Impact (Estimated)