Tag: M22

M22 Great Sagittarius Cluster

Messier 22, sometimes called Great Sagittarius Cluster is a globular cluster, visually located very close to the galactic core of the Milky Way. If we look in this direction by a telescope, the surrounding of this cluster is filled with many stars. The cluster itself contains approximately 100 000 stars and it has roughly 97 light-years in diameter. The region of the sky where is this cluster located is poorly visible from my home, therefore every time I travel south with my portable telescope, I capture some deep space objects in this region. This picture was taken under the dark skies of Kythira.

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length570 mm
MountRainbow Astro RST 135
AutoguidingZWO 174MM, Guidescope 30 mm
CameraZWO 071 Pro @-0°C
CorrectorTS MaxField
Exposure59x180s, Gain 94, bin 1x1,

M22 Great Sagittarius Cluster

This spectacular globular cluster is called Messier 22 or Great Sagittarius Cluster. It’s located, surprisingly, in constellation Sagittarius, close to Galactic Bulge, therefore the background is illuminated by many stars. Oh, and it’s so many of them. If you realize that each bright dot is a star and most probably not just a star, but whole solar system, it makes you think how big the universe is. The distance from Earth only 10’000 light-years, makes this cluster the closest one to us.

Due to its low declination, it’s quite difficult to photograph this cluster from Central Europe. Therefore I took the opportunity and captured M22 on Milos Island. The picture is an integration of only 94 minutes.

Technical details:

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length660 mm
MountiOptron CEM25P
AutoguidingQHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
CameraZWO 071 Pro @-10C
CorrectorExplore Scientific HR coma corrector
FiltersAstronomik L-1 - UV IR Block Filter
Exposure47x120s, Gain 134, bin 1x1,