Palomar 12

Globular cluster in the constellation Capricornus

Palomar 12
Distance		63.6 ± 2.9 kly (19.50 ± 0.89 kpc)[2]
Apparent magnitude (V)	11.99
Apparent dimensions (V)	17.4′
Physical characteristics
Mass	1.59×104[3] M☉
Radius	162 ± 8 ly[4]
Metallicity	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = –0.85[3] dex
Estimated age	6.5 Gyr[5]
Notable features	Probably extragalactic
Other designations	GCl 123[6]
See also: Globular cluster, List of globular clusters

Palomar 12 is a

Palomar Globular Clusters

group.

First discovered on the National Geographic Society – Palomar Observatory Sky Survey plates by Robert George Harrington and Fritz Zwicky,^[7] 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 [Fe/H] ≈ −0.8.^[5] It has an average luminosity distribution of M_v = −4.48.^[8]

Based on

• Messier 54

References

External links

Wikimedia Commons has media related to Palomar 12.

• Simbad reference data
• SEDS: Palomar 12, Capricornus Dwarf
• Palomar 12 on
  WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• NASA Astronomy Picture of the Day: Palomar 12 (19 February 2015)