From liftoff to splashdown , glenn was aloft for 4 hours , 55 minutes and 23 seconds .
从发射到溅落，格伦在空中呆了4小时55分钟23秒。
The first private spacecraft to visit the international space station made a dramatic return home thursday with a precise splashdown in the pacific ocean off the southern california coast .
Six of the dracos are needed for re-entry and eventually spacex hopes to use an updated version of them to allow pinpoint landings on solid ground , rather than the ocean splashdown that will be used initially .
