α¹ Her. Magnitude 3.48, orange-red. Visible to the naked eye from a reasonably dark site.
Astronomers call it α¹ Her — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Rasalgethi is the name people actually use.
Rasalgethi shines at magnitude 3.48, making it visible to the naked eye from a reasonably dark site. Its B−V colour index of 1.44 makes it orange-red to the eye, corresponding to a surface temperature of under 4,000 K.
It sits at right ascension 17.24 hours and declination +14.4°. It straddles the celestial equator, so it is visible from essentially anywhere on Earth at the right time of year.
SkyRef shows exactly where Rasalgethi is from your location right now — altitude, compass direction, and rise and set times.