Image information:

Date: 06/20/2015
Equipment: QSI583ws with internal filter wheel and Astrodon E series Gen II LRGB filter set through AT65EDQ telescope on Losmandy GM8 mount.
Image type: LRGB
Exposure time: 7X6min Luminance Binned 1X1, RG&B 7X6min each binned 1X1.
Comment: M22 is a difficult target for me, since it is low on the horizon (always below 20 degrees).

Object information:

Object designations:

M22, NGC6656
Object type:
Globular cluster
Object size:
Constellation: Sagittarius

With distance of 10.4 kly M22 is one of the closer globular clusters to us. It is the first object of this type discovered. M22 contains more than 100 000 stars in the diameter of about 100 ly. These stars formed together and are gravitationally bound. It is one of the only four globular clusters known that contains a planetary nebula. Although M22 is spectacular as it is, much of its light is obscured by dust in our galaxy.

Related images:

List of related images:

M22, OSC, Altair Hypercam 533C through Pentax-M* 67 300mm F/4 ED (IF)