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WASP-7: a bright transiting-exoplanet system in the southern hemisphere

We report that a Jupiter-mass planet, WASP-7b, transits the V = 9.5 star HD 197286 every 4.95 d. This is the brightest discovery from the WASP-South transit survey so far and is currently the brightest transiting-exoplanet system in the southern hemisphere. WASP-7b is among the densest of the known Jupiter-mass planets, suggesting that it has a massive core. The planet mass is 0.96+0.12 ?0.18 MJup, the radius is 0.915+0.046 ?0.040 RJup, and the density is 1.26+0.25 ?0.21 ?Jup 1.67+0.33 ?0.28 g cm?3 .

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