NGC 6209
NGC 6209 is a spiral galaxy in the constellation of Apus. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. However, 13 non-redshift measurements give a closer mean distance of. It was discovered by British astronomer John Herschel on 28 June 1835.
NGC 6209 is a Seyfert II galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable. Additionally, NGC 6209 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.