 Arrokoth is about 22 miles long. It consists of two lobes, one a few miles wider than the other. That makes the object look like a smushed snowman or a rubber duck without a bill. The two lobes probably began as separate objects, but they gently mashed together. A recent study found that the bigger lobe probably was formed from several smaller bodies, chunks of ice and rock a few miles across that all mashed together.