γ Gem. Magnitude 1.93, white. Comfortably visible to the naked eye from a suburban sky.
Astronomers call it γ Gem — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Alhena is the name people actually use.
Alhena shines at magnitude 1.93, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.00 makes it white to the eye, corresponding to a surface temperature of around 8,000 K.
It sits at right ascension 6.63 hours and declination +16.4°. It straddles the celestial equator, so it is visible from essentially anywhere on Earth at the right time of year.
SkyRef shows exactly where Alhena is from your location right now — altitude, compass direction, and rise and set times.