top of page

M75 - Globular Cluster in Sagittarius | Astrophotography Tips & Pictures

Messier 75 is a large globular cluster in the constellation Sagittarius, but it appears very small from Earth. It is one of the most distant and dense globular clusters in the Messier catalog. M75 is home to about 400,000 stars and has an age of about 13 billion years.

Object Designation: M75, NGC 6864

Also known as: N/A

Constellation: Sagittarius

Object Type: Globular Cluster

Distance: 67,500 light-years away

Magnitude: 8.5

Discovery: Pierre Méchain on August 27th, 1780

The M75 Cluster is and easy target for beginner astrophotographers, as long as you've got a long enough focal length for it. Although it has a large diameter, it does not have a large apparent size in the sky and can look smaller than anticipated in photographs. Being in Sagittarius, M75 is a nice Summer astrophotography target.


M75 Astrophotography with a RASA 8 and Color Camera

September 2023

M75 was a secondary target and was added to my sequence at the beginning of the night while waiting for my desired object to rise high enough in the sky. I only spent one hour capturing Messier 75, and the result turned out good enough that I didn't feel the need to spend more time on it. I do not see any hints of gasses or dust in the background with the current data, and doubt that there are any.

This picture was taken from the Bortle 2 skies of Utah Desert Remote Observatories with our f/2 RASA 8 telescope.

Messier 75 Cluster Astrophotography


Camera: ZWO ASI2600MC

Telescope: Celestron RASA 8

Mount: 10Micron GM1000 HPS

Processing: Pixinsight, with R-C Astro plugins. Final touches in Skylum Luminar Neo