I ran across this name in a Sky Tools print out of asteroid Prokne for last night. There are three open clusters near Messier 67 in Cancer: Chupina 1, 3 and 5. They are not listed in Uranometria or Millenium atlases. There is an article describing them that states, "The old stellar cluster
M67 still apparently contains clumpy outer structure (Chupina & Vereshchagin 1998)". Amateur images do not seem to capture them.

Anyone else ever hear of these?

Al