The lack of an impact crater also suggested that the object could not have been a sturdy iron meteorite but a more fragile object, such as a relatively rare, stony asteroid or a small comet.

• 找不到撞击坑洞，也意味该天体可能不是结实的铁质陨石，而是比较易碎的天体，例如较罕见的岩石小行星或小型彗星。