I live in a section of Novato, Ca. which is on landing approaches to 4 different air ports + 1 military base. I've been here in this location since 1984, so I am well aware of the flight routes around here.At 20:56 - 21:02 I spotted a light coming out of the west / it seemed to be at about the same height as a b-52 ( over 10,000 ft.) size was bigger that a b-52 / was cigar shaped and the whole craft was glowing white with some slight roiling to the plasma. I ran to get my camera, but battery dead.I saw a similar thing 2 years earlier, but without binoculars.This thing did not have any conventional navigation lights.I can send sketch later