U1.11

U1.11 is a large quasar group located in the constellations of Leo and Virgo. It is one of the largest LQG's known, with the estimated maximum diameter of 780 Mpc (2.2 billion light-years)[1] and contains 38 quasars. It was discovered in 2011 during the course of the Sloan Digital Sky Survey. Until the discovery of the Huge-LQG in November 2012, it was the largest known structure in the universe, beating Clowes–Campusano LQG's 20-year record as largest known structure at the time of its discovery.

  1. ^ Clowes, Roger G.; Campusano, Luis E.; Graham, Matthew J. & Söchting, Ilona K. (2012). "Two close large quasar groups of size ∼ 350 Mpc at: Two close large quasar groups". Monthly Notices of the Royal Astronomical Society. 419 (1): 556–565. arXiv:1108.6221. Bibcode:2012MNRAS.419..556C. doi:10.1111/j.1365-2966.2011.19719.x. S2CID 31553670.