郎位四

后发座16，又名BD+27 2134，HD 108382、SAO 82314、HR 4738，是后发座的一颗恒星，视星等为5，位于银经214.72，银纬84.55，其B1900.0坐标为赤经12h 21m 59.3s，赤纬+27° 84.55′ 46″。

16 Comae Berenices is a single star in the northern constellation of Coma Berenices. 16 Comae Berenices is the Flamsteed designation. It is a member of the Coma Star Cluster and is visible to the naked eye with an apparent visual magnitude of 4.96. Based upon an annual parallax shift of 11.7 mas, it is located about 279 light years away.

This is a chemically-peculiar A-type main-sequence star with a stellar classification of A4 V. It displays an infrared excess, suggesting the presence of an orbiting debris disk at a mean distance of 18.2 AU with a temperature of 180 K. 16 Com has 2.54 times the mass of the Sun and 3.71 times the Sun's radius. The star is 310 million years old with a projected rotational velocity of 80 km/s. It is radiating 67 times the Sun's luminosity from its photosphere at an effective temperature of 8,299 K.