ζ Ori. Magnitude 2.05, blue-white. Comfortably visible to the naked eye from a suburban sky.
Astronomers call it ζ Ori — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Alnitak is the name people actually use.
Alnitak shines at magnitude 2.05, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of -0.21 makes it blue-white to the eye, corresponding to a surface temperature of over 10,000 K.
It sits at right ascension 5.68 hours and declination -1.9°. It straddles the celestial equator, so it is visible from essentially anywhere on Earth at the right time of year.
SkyRef shows exactly where Alnitak is from your location right now — altitude, compass direction, and rise and set times.