 How was Queazy able to determine how long the trio were floating around in space before waking?
While Queazy—so called because his full name was Quentin Zuyler—dropped the ship straight down to the smooth surface of the asteroid, and clamped it tight with magnetic grapples, Bob flung open the lazarette, brought out two space-suits. Now that he and Queazy had found the asteroid, they were desperate to get it to its destination, for fear that the Saylor brothers might get wind of what was going on, and try to beat them out of their profits. Now they scuffed along the smooth-plane topside of the asteroid, the magnets in their shoes keeping them from stepping off into space. He and Queazy caught up with her on the side of the asteroid they hadn't yet examined.
 From the chronometer
 From the chronometer  By how much fuel was left in their ship  From how much oxygen was left in their suits  By his declared level of hunger