Binary star in the constellation Grus
υ Gruis , Latinised asUpsilon Gruis , is adouble star in the southernconstellation ofGrus . Theapparent magnitude is 5.61, which is bright enough to be viewed with the naked eye. Located around 87 parsecs (280 ly) distant, the white-hued primary is anA-type main-sequence star of spectral type A1V, a star that is currently fusing its corehydrogen . it is spinning rapidly with aprojected rotational velocity of 320 km/s. The companion is a magnitude 8.24 star at anangular separation of 0.90″ from the primary along aposition angle of 205°, as of 2009.[ 10]
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