NGC 3557
galaxy
NGC 3557 is a large elliptical galaxy in the constellation of Centaurus. Its velocity with respect to the cosmic microwave background is 3398 ± 23 km/s, which corresponds to a Hubble distance of 50.12 ± 3.53 Mpc. However, 20 non-redshift measurements give a distance of 32.905 ± 2.289. The galaxy was discovered by British astronomer John Herschel on 21 April 1835.