Palomar 12
Template:Short description Template:Use dmy dates Template:Infobox globular cluster
Palomar 12 is a globular cluster in the constellation Capricornus, and is a member of the Palomar Globular Clusters group.
First discovered on the National Geographic Society – Palomar Observatory Sky Survey plates by Robert George Harrington and Fritz Zwicky,[1] it was initially catalogued as a globular cluster; however, Zwicky came to believe it was actually a nearby dwarf galaxy in the Local Group. It is a relatively young cluster, being about 30% younger than most of the globular clusters in the Milky Way.[2] It is metal-rich with a metallicity of Template:Nobr.[3] It has an average luminosity distribution of Template:Nobr.[4]
Based on proper motion studies, this cluster was first suspected in 2000 to have been captured from the Sagittarius Dwarf Elliptical Galaxy (SagDEG) about 1.7 Ga ago.[5] It is now generally believed to have originated in that galaxy and is associated with the Sagittarius Stream.[3] It is estimated to be 6.5 Gyr old.[3]
See also
References
External links
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