The 'Separation of Modules' is set for 08:12:12 GMT; at an altitude of 139.9 km / 86.9 miles.

The spacecraft will separate into 3 sections. The 'Orbital Module' & 'Instrumentation Module' will burn up during reentry; only the 'Descent Module' with the crew, will survive reentry. pic.twitter.com/vzwnHrgkOs

— Doug Wheelock (@Astro_Wheels) December 14, 2017