廁增五(天兔座θ)拉丁化的名字來自θLeporis,是一顆孤獨的恆星[9]。這顆白色的恆星,位於南天星座的天兔座。它的視星等為4.67等[2],使其明亮到可以用肉眼觀看。基於從地球量測的每年18.88mas的視差[1],該系統位於距離太陽大約173光年之處。這顆恆星大約在160萬年前最接近太陽,當時它位於太陽的29光年(9.0秒差距)範圍內[10]。
這是一顆普通的A型主序星,恆星分類為A0V[3], 年齡約2.07億年[7]。它以207公里/秒的投影自轉速度快速旋轉[7]。這使這顆恆星具有扁球的形狀,估計赤道隆起比極半徑大10%[11]。估計它的質量為2.35太陽質量[6],來自光球的光度是太陽光度的41倍[6],表面的有效溫度為10,453k[7]。
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