危宿三（ε Peg / 飞马座ε）是飞马座的最亮星，俗名Enif，源于阿拉伯语“鼻子”，因为其处于飞马座的马鼻处，我们可以根据秋季大四方来寻找它。

危宿三是一颗K2Ib型的超巨星，正处于其生命阶段的末期。用肉眼看来危宿三'带有橙红色，这颗恒星也是一个LC型的不规则变星。亮度有记载的最大值超过1等。该星拥有11倍于太阳的质量和186倍太阳半径，可以说是一个相当大的恒星，太阳的亮度仅有该星的12000分之一。这颗恒星很可能作为一个II型超新星爆发，它只剩下几百万年的寿命。

位于爱尔兰的国际流星组织（IMO）正在研究其是否含有行星系统。

Epsilon Pegasi (ε Peg, ε Pegasi) is the brightest star in the northern constellation of Pegasus. It has the traditional name Enif (EE-nif). The name Enif is derived from the Arabic word for nose, due to its position as the muzzle of Pegasus. With an apparent visual magnitude of 2.4, this is a second-magnitude star that is readily visible to the naked eye. The distance to this star can be estimated using parallax measurements from the Hipparcos astrometry satellite, yielding a value of around 690 light-years (210 parsecs).