δ Leo. Magnitude 2.56, white. Comfortably visible to the naked eye from a suburban sky.
Astronomers call it δ Leo — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Zosma is the name people actually use.
Zosma shines at magnitude 2.56, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.12 makes it white to the eye, corresponding to a surface temperature of around 8,000 K.
It sits at right ascension 11.24 hours and declination +20.5°. It sits well north on the sky and is comfortably placed for northern hemisphere observers.
SkyRef shows exactly where Zosma is from your location right now — altitude, compass direction, and rise and set times.