HR 7578

HR 7578 (also known as V4200 Sagittarii) is a binary star in the constellation of Sagittarius. Their combined apparent magnitude is 6.18. Parallax measurements by the Gaia spacecraft put the system at 46.01 light-years (14.107 parsecs) away, making this a nearby system.

The two stars of HR 7578 are fairly old, older than the Pleiades but possibly younger than the Hyades. The stars are between $−124.476$ and $−410.440$ years old. Both are K-type main-sequence stars. Both stars have a minimum mass of, and are unusually metal-rich, showing high amounts of cyanide and sodium in their spectra.

HR 7578 is a BY Draconis variable. This is a class of variable star whose variability comes from starspots on the stars' surfaces. HR 7578 also has a common proper motion companion, 2MASS J19542064−2356398. It is a red dwarf that is at least 580 astronomical units from the central star system.