Open Clusters Archives - Page 2 of 5 - Roger Nelson Astronomy

NGC 869/884 Double Cluster

Roger Nelson February 5, 2024110 Finest NGCs, Herschel 400 Catalog, Lists, NGC Objects, Open Clusters, Portfolios Leave a Comment

NGC 869/884 Double Cluster NGC 869 is the westernmost of the Double Cluster. NGC 884 is the easternmost of the Double Cluster. NGC 869 and 884 are often designated h and χ Persei, respectively. The cluster is about 14 million years …

NGC 663

Roger Nelson February 4, 2024110 Finest NGCs, Herschel 400 Catalog, Lists, Log Book, NGC Objects, Open Clusters, Portfolios Leave a Comment

NGC 663 NGC 663 (also known as Caldwell 10) is a young open cluster in the constellation of Cassiopeia. It has an estimated 400 stars and spans about a quarter of a degree across the sky. It can reportedly be …

NGC457

Roger Nelson February 4, 2024110 Finest NGCs, Herschel 400 Catalog, Lists, Log Book, NGC Objects, Open Clusters, Portfolios Leave a Comment

NGC457 NGC457 (also designated Caldwell 13, and known as the Dragonfly Cluster, E.T. Cluster, Owl Cluster, Kachina Doll Cluster or Phi Cassiopeia Cluster) is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel on August …

NGC 281

Roger Nelson February 4, 2024110 Finest NGCs, Lists, Log Book, NGC Objects, Open Clusters, Portfolios Leave a Comment

NGC 281 NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way’s Perseus Spiral Arm. This 20×30 arcmin sized …

M103

Roger Nelson January 21, 2024Herschel 400 Catalog, Lists, Log Book, Messiers, NGC Objects, Open Clusters, Portfolios Leave a Comment

M103 Messier 103 (also known as M103, or NGC 581) is an open cluster where a few hundred, mainly very faint, stars figure in Cassiopeia. It was discovered in 1781 by Charles Messier’s friend and collaborator Pierre Méchain. It is …

M93

Roger Nelson January 21, 2024Lists, Log Book, Messiers, NGC Objects, Open Clusters, Portfolios Leave a Comment

M93 Messier 93 or M93, also known as NGC 2447, is an open cluster in the modestly southern constellation Puppis, the imagined poop deck of the legendary Argo. It was discovered by Charles Messier then added to his catalogue of …

M67

Roger Nelson January 20, 2024Lists, Log Book, Messiers, NGC Objects, Open Clusters, Portfolios Leave a Comment

M67 M67 or Messier 67 (also known as NGC 2682) is an open cluster in the southern, equatorial half of Cancer. It was discovered by Johann Gottfried Koehler in 1779. Estimates of its age range between 3.2 and 5 billion …

M52

Roger Nelson January 18, 2024Lists, Log Book, Messiers, NGC Objects, Open Clusters, Portfolios Leave a Comment

M52 M52 or Messier 52 , also known as NGC 7654, is an open cluster of stars in the highly northern constellation of Cassiopeia. It was discovered by Charles Messier in 1774. It can be seen from Earth under a …

M50

Roger Nelson January 18, 2024Lists, Log Book, Messiers, NGC Objects, Open Clusters, Portfolios Leave a Comment

M50 M50 or Messier 50, also known as NGC 2323, is an open cluster of stars in the constellation Monoceros. It was recorded by G. D. Cassini before 1711 and independently discovered by Charles Messier in 1772 while observing Biela’s …