NGC 6871 is an open star cluster located in the constellation Cassiopeia. It was discovered by the astronomer William Herschel in 1788. The cluster is approximately 3,600 light-years away from Earth and contains several bright stars that are relatively young, with ages estimated around 20 million years. The cluster is notable for its rich concentration of stars and is often studied for insights into stellar formation and evolution. NGC 6871 is also a popular target for amateur astronomers due to its visibility and the beauty of its star field, making it a fascinating object in the night sky.