The SSA22 Protocluster, also known as EQ J221734.0+001701, is a galaxy protocluster located at z=3.1 in the SSA 22 region. The protocluster of galaxies is located at 22ʰ 17ᵐ 34.0ˢ +00° 17′ 01″. The protocluster was originally discovered in 1998.

Distance (co-moving): 12 billion light-years