Gamma Circini (y Cir), is a star located in the constellation Circinus. Gamma Circini is also known as HR 5704, and HD 136415. Gamma Circini is a spectroscopic binary. The system is located at Right Ascension 15h 23m 23s and Declination −59° 19 arcmin 15 arcsec. The system has a combined apparent visual magnitude of +4.48, and is located at a distance of 156 pc (509 ly) from the Sun.
Gamma Circini A is a B5IV subgiant star, with an effective temperature of 15000 Kelvin. It has an apparent visual magnitude +5.1, an absolute magnitude of -1.49 and a mass of 5 solar masses. Gamma Circini A is a Be Lacertae variable star.
Gamma Circini B, also known as HD 136416, is a F8V dwarf star, with an effective temperature of 6000 Kelvin. It has an apparent visual magnitude of +5.5, and a mass of 1.2 solar masses.
The angular separation between A and B is approximately 2 arcsec.