dM Proper-motion Companions to 51 Peg

A Common Proper Motion Companion to the Exoplanet Host 51 Pegasi
http://arxiv.org/abs/1003.3032

Abstract wrote:

The exoplanet host 51 Pegasi has a widely separated red dwarf companion. Two other, far more distant, stars are also co-moving with this star, showing that they are at least of common Galactic orbit due to a common origin.

So the "51 Pegasi moving group" then?

Sounds good to me. Are moving groups usually only a handfull of stars?

Or maybe not.

On the Nature of the Purported Common Proper Motion Companions to the Exoplanet Host Star 51 Peg
http://arxiv.org/abs/1004.4700

Abstract wrote:

Greaves (2006) proposed that three red, high proper motion stars within 10 degrees of 51 Peg (NLTT 54007, 54064, & 55547) are co-moving companions to this famous exoplanet host star. While the stars clearly have proper motions similar to 51 Peg, the inferred kinematic parallaxes for these stars produce extremely inconsistent color-magnitude positions 2 to 4 magnitudes below the main sequence. All three stars are likely to be background stars unrelated to 51 Peg.