X-37B in orbit for more than 270 days Posted on November 30, 2011 by alert5 The second X-37B will hit its 270-day design limit today. Related posts (Automatically Generated): X-37B dropping altitude, could land soon Second X-37B could spend more time in orbit AFRL to unveil Raptor supercomputer Sea Gripen design to be carried out in U.K. LM, Raytheon given $107 million each for Space Fence designs First Glonass-K reached orbit