Systemic, everyone's favorite extrasolar planet blog, talks about the detection of a 2 or 3 Jovian-mass planet orbiting Pollux, aka Beta Geminorum. Preprints here and here
P.S. The graph above shows Pollux's velocity towards and away from Earth. You can see how it varies back and forth in a regular period, especially with the newer higher-quality data. Given the period and amount of wobbling, you can discover planets and their minimum masses.
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