What are asteroid families?

Some articles on asteroids, families, asteroid, asteroid families:

Asteroid Belt - Families and Groups
... the Japanese astronomer Kiyotsugu Hirayama noticed that the orbits of some of the asteroids had similar parameters, forming families or groups ... Approximately one-third of the asteroids in the asteroid belt are members of an asteroid family ... Graphical displays of these elements, for members of the asteroid belt, show concentrations indicating the presence of an asteroid family ...
Asteroid Family - Identification of Members and Interlopers
... When the orbital elements of main belt asteroids are plotted (typically inclination vs ... concentrations are seen against the rather uniform background distribution of generic asteroids ... These concentrations are the asteroid families ...

Famous quotes containing the word families:

    Affection, indulgence, and humor alike are powerless against the instinct of children to rebel. It is essential to their minds and their wills as exercise is to their bodies. If they have no reasons, they will invent them, like nations bound on war. It is hard to imagine families limp enough always to be at peace. Wherever there is character there will be conflict. The best that children and parents can hope for is that the wounds of their conflict may not be too deep or too lasting.
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