# Observed planets in binary star L4 or L5?

It seems to me, from my understanding of the Lagrange points, that a binary system with the appropriate mass ratio between stars could support planets in the L4 and L5 Lagrange points (I've encountered this, actually, in science fiction; Larry Niven put such a planet in the Procyon system for some of his stories).

Provided the two stars follow a near-circular orbit, could such a configuration be stable? Have any exoplanets in this configuration been observed?

Thanks for any info.

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