NGC 6366

NGC 6366 is a globular cluster located in the constellation Ophiuchus. It is designated as XI in the Shapley–Sawyer Concentration Class and was discovered by the German astronomer Friedrich August Theodor Winnecke on 12 April 1860.^[2] It is at a distance of 11,700 light years away from Earth.^[3][4][5][6]

NGC 6366
NGC 6366 as seen through the Hubble Space Telescope
Observation data (J2000 epoch)
Class	XI
Constellation	Ophiuchus
Right ascension	17h 27m 44.3s
Declination	−05° 04′ 36″
Apparent magnitude (V)	9.5
Apparent dimensions (V)	13.0'
Physical characteristics
Absolute magnitude	-5.47
Metallicity	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = = −0.60±0.03[1] dex
Other designations	GCL 65
See also: Globular cluster, List of globular clusters

NGC 6366 is similar in composition to M 71 or NGC 6342.^[7] It is metal-rich for a globular cluster, and all of its stars appears to have formed in the same epoch.^[1]

See also

• List of NGC objects (6001–7000)
• List of NGC objects