Delta Sagittarii

Delta Sagittarii (Delta Sgr, δ Sagittarii, δ Sgr) is a double star in the southern zodiac constellation of Sagittarius. It has the traditional names Kaus Media, Kaus Meridionalis, and Media.The apparent visual magnitude of this star is +2.70, making it easily visible to the naked eye. Parallax measurements place the distance at roughly 348 light-years (107 parsecs) from Earth.

This is a giant star with a stellar classification K3 III. It has a mass of about 3.4 times that of the Sun, while the outer envelope has expanded to 129 times the Sun's radius. With an effective temperature of roughly 3,600 K, it is radiating 2,500 times the luminosity of the Sun.

It has three dim companions:

• a 14th magnitude star at a separation of 26 arcseconds,
• a 15th magnitude star at a separation of 40 arcseconds, and
• a 13th magnitude star at a separation of 58 arcseconds from the primary.

It is not certain that these stars form a physical system or whether they are merely aligned by chance.