Sh2-200, the Bear Claw Nebula, is an old planetary nebula in Cassiopeia. Stewart Sharpless originally classified it as an HII region in 1959. In 1982, Weinberger, et al, proposed it as a planetary nebula instead of as merely an HII region. They estimated its distance at around 1,000 light years, but other estimates place it at 3,600 light years away from us.