NGC 3766, the Pearl Cluster, is an open star cluster in the constellation Centaurus. It was discovered by Abbe Lacaille on March 5, 1752 from South Africa.
NGC 3766 is a very dense open cluster and shimmers like a pearl. It is a good binocular target, but can also be glimpsed with the naked eye from dark skies. It is located near the Lambda Centauri nebula, IC 2948.
The Pearl Cluster lies at a distance of 5500 light years, has a visual magnitude of 5.3, and an apparent diameter of 12 arc minutes.