There aren't really any widely recognized superstitions about asteroids. Asteroids are generally seen as celestial objects of scientific interest, not objects of myth or folklore.

However, there are some cultural beliefs and fears that might be connected to asteroids, though not exactly superstitions:

* Doomsday scenarios: The potential for a large asteroid impact causing catastrophic damage is a real threat, and has been depicted in movies and popular culture. This fear of a "doomsday asteroid" might be considered a superstition by some, even though it's based on a real possibility.

* Astrology: Some people believe that asteroids have an influence on personal lives and destinies, similar to how astrologers interpret the influence of planets. This belief is more related to astrology than a true superstition about asteroids themselves.

It's important to remember that asteroids are fascinating objects that we are still learning about. While there are valid concerns about their potential impact, superstitions about them are not based on any scientific evidence.