Asteroids are bodies which orbit our Sun like the planets; they were formerly called Minor Planets as they are smaller than 1000 km. in diameter. There are hundreds of thousands of them, mainly orbiting between Mars and Jupiter.
Most Meccano orreries built hitherto have been of our Sun, its planets or their moons and only a Planetarium described in ModelPlan 73 has had asteroids included; these were the 4 largest asteroids, Vesta, Ceres, Pallas and Hygiea. ModelPlan 165 is the first (in any medium) to be specifically designed to show the motion of asteroids.
Ref: MP165 Price: £7.40