 Why was Mr. Burnside so determined to have such a large and specific asteroid delivered to his backyard?
"Better take it easy," he advised, "until I land the ship and we use the atomic whirl spectroscope to determine the composition of the asteroid." And yet, if by some chance there was such a rigidly specified asteroid, their financial worries would be over. That they had actually discovered the asteroid, using their mass-detectors in a weight-elimination process, seemed like an incredible stroke of luck. For there are literally millions of asteroids in the asteroid belt, and they had been out in space only three weeks. The "asteroid in your back yard" idea had been Bob Parker's originally. Now it was a fad that was sweeping Earth, and Burnside wasn't the first rich man who had decided to hold a wedding on top of an asteroid. 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 satisfied himself as to the exterior of the asteroid, and then sent the twin beams deep into its heart. "It's—it's very important that this—this asteroid stay right where it is," she said huskily. The big ship had landed, and little blue sparks crackled between the hull and the asteroid as the magnetic clamps took hold.
 His granddaughter had requested one for her wedding.
 He didn't actually want it, he just wanted the Saylor brothers and Parker and Queazy to be occupied.  He had previously had one that was similar and wanted another for reminiscing.  He wanted something more grand and valuable than anyone else.  His granddaughter had requested one for her wedding.