microplanetoid

plural microplanetoids

1. literatureAn astronomical body smaller than a planetoid, such as an asteroid or planetesimal.

   Around three hundred meters long and a little less than half as wide, the new shape was much smaller than the microplanetoid configuration.

   2015, John Steiner, Flipspace:Astraeus Event, Missions 10-12, →ISBN, page 81

   2 more examples

   I mean, the Fomalhauters weren't having enough problems with the repairs to their exhaust duct—their StarGrazer'd taken a hit from a rogue microplanetoid—then this earthbound yo-yo tries to put a goddam drift netter up their tailpipe.

   1998, Dana Stabenow, Killing Grounds, →ISBN, page 104

   The loose group of rocks, sand, random molecules, and microplanetoids known as the Hallelujah node was traveling in company around the Sun at a speed of eleven miles per second.

   2009, Robert A. Heinlein, The Rolling Stones, →ISBN