Koronis family
The Koronis or Koronian family, also known as the Lacrimosa family, is a very large asteroid family of stony asteroids, located in the outer region of the asteroid belt. They are thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. The family is named after 158 Koronis, and the largest known member is about in diameter. The Koronis family travels in a cluster along the same orbit. It has 5949 members.
This family has two subfamilies. The Karin family was formed remarkably recently in a catastrophic collision, with an estimated age of 5.72 million years. The Koronis family with 246 members is the other. It formed 15 million years ago by a non-catastrophic collision with 158 Koronis.
On August 28, 1993, the Galileo spacecraft visited a member of this family, 243 Ida. A photo of Ida is part of the composite image at right.Large members
