Categories Astronomy Astrophotography Clear Skies Deep Sky Object Open Cluster Space Astrophoto: Open Cluster NGC 6633 – 07/22 Post author By Thomas Hanrath Post date 4. July 2022 No Comments on Astrophoto: Open Cluster NGC 6633 – 07/22 The small star cluster (about 30 stars) NGC 6633 in the constellation Ophiuchus. The small open cluster NGC 6633. Photons were collected in one of the too short summer nights. Tags NGC 6633