α Oph. Magnitude 2.08, white. Comfortably visible to the naked eye from a suburban sky.
Astronomers call it α Oph — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Rasalhague is the name people actually use.
Rasalhague shines at magnitude 2.08, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.15 makes it white to the eye, corresponding to a surface temperature of around 8,000 K.
It sits at right ascension 17.58 hours and declination +12.6°. It straddles the celestial equator, so it is visible from essentially anywhere on Earth at the right time of year.
SkyRef shows exactly where Rasalhague is from your location right now — altitude, compass direction, and rise and set times.